is a strong champion, however she does have very serious weaknesses. She is only doing well because of the tank meta, she is a very good champ to use against 
(One of the continuously popular supports in the LCS). So there is nothing wrong with her at all and she does not need a nerf.
Her overtuned RE shield values WILL need adressing, whether we like it or not. And this is a Karma main speaking.
Karma isn't good because of the tank meta. The Braum matchup (46,6%), is even worse than her average matchup (49,6%). Also, one of Karma's problems IS her lack of clear strengths/weaknesses. As you just proved.
The problem with Karma is her overboard reliability. All her power lies in RE, an ability that can't be countered and doesn't need skill to apply. There is also no point in using any other mantra in pro play; her damage falls off, so RQ is inefficient in teamfights, her RW heal is too selfish and the root too unreliable. Add to that, that her other abilities can provide as mantra-regain, it's really the only option she has.
This was not a problem, when she still dealt damage with RE. The damage part meant a serious tradeoff when shielding your team, as it's additional power unused, which is a no-no in pro play. So finding the right time and target to shield was crucial. Thanks to the missguided 5.10 changes to Karma, they didn't only remove part of her 4 year identity, they also broke the decision making about her mantra.
Karma's RE shield values need to be nerfed and the damage part reintroduced, to stop her from being an overeffective and boring to watch shieldbot.
She isn't OP, but I could see them nerfing her anyways. Let's not forget what they did to the likes of ekko/nautilus because they had a hard time understanding what their "annoying parts" were.
This just proves Karma needs a change of direction, not nerfs or buffs. Karma will always suffer from being either an unjustifiable pick or the go to pick amoung the Enchanters, because she dabbles in mostly all of their strengths. It's just like what Riot said about Vel'Koz before they reworked him, the only reason for picking him was if he was doing the most damage, Karma is in a similar situation with Enchanters.
Personally I feel as if Riot needs to start by fixing her Mantras. After 5.10 Karma became an RQ bot because RW and RE were poor, now she's an RE bot because RE is now over tuned, RQ falls off and RW is still poor. Karma never had a mantra diversity problem before 5.10, all she's ever needed is a direction.
My solution would be to restore her solo lane damage options and give her the utility she needs to open bot lane for melee carries, this way she can be strong in a new unexplored area of gameplay.
Karma isn't going to get nerfed, why do people continue to say this. She sees a like of pro play since her shield buff, yes, but that's because she was the "next best thing" since Lulu got HEAVILY nerfed on that same patch. Karma and Lulu are played very similarly. As for the pro scene, Karma has under-performed due to being counter picked and not playing the proper style for her kit when she supports. Lulu is getting buffed along with the improved support items next patch. The new support items are going to make Lulu (who is also getting buffed as I said before) take the spotlight away from Karma along with Soraka who will also benefit hugely from the new items as well. I believe they should move Karma's power from her R+E to her R+W by allowing R+W to snare for half of both the bonus and regular duration of the root when her tether is broken. This makes her R+E less powerful, but gives her reliable CC (something she has been lacking) when she uses her ult.
Honestly, even with how she is now, she is perfectly fine and not over power.
BTW, whats with the worry of karma being nerfed when her win rate and pick rate is 49% with 2.7% mid/8.0% sup pick rate?
I think karma is fine
I feel like I can see karma support mains being hit a little harder if they were to nerf her since I'm pretty sure her win rate as a support is slightly lower than that of a karma mid. So basically, really bad news for me if they nerf her :(. But still, according to websites her win rate is around 49% which is balanced. I'd say her biggest weakness is that a big loss in power could occur when the enemy hits level 6. I think she only seems op to people because of the really strong early game. Hopefully riot has champs other than karma that are more important to deal with in terms of nerfs. (fingers crossed nothing bad happens).
As someone who loves Karma support, I wouldn't say she's OP, but she's pretty damn reliable. Getting ult at level 1 gives her massive amounts of power early on, and her kit offers a variety of utility. She's basically the support's multi tool.
Also, I'm not actually sure what happened, when the LCS decided that poke supports were in. When having that double ranged bot lane, completely locked out tank supports from the meta.
oh well she is gonna get nerfed anyway. i feel like they will nerf her early game and buff her late game but the problem is that. shes just so bad. by bad i mean so lame and poorly designed. she needs a major rework like poppy.
Common idea early game nerf, late game buff.Power transfer.It seems logical.
her shield is retarded
as a nid main i also agree with you... karma is in a good spot right now.
nidalee was in a good spot before the nerf to remove the root on traps.
sure nid was crazy good at high level play and had an amazing clear. but the nerf to her totally ignored that she was ONLY crazy good at high level play.
and like azir who is also crazy op at high lvl play, they are balanced at most elos
becuase while no one is goig to deny that the nerfs to nid DID weaken her high lvl play to a much more balanced level.
they DESTROYED her lower lvl play.. and the ROOT was the thing that LET players jungle with her without the crazy insane mechanic that all higher lvl players have.
removing the root did hurt high lvl play clear speed but it nearly destroyed her lower lvl play.
same issue with ryse
ryse is nearly always picked or banned in LCS. but outside of that he has the lowest win rate of ANY champ in the game
i dont have a problem with roit balacing a champ for high lvl players.. but they CAN'T do it in a way that DESTROYS the champ for ne1 who isn't challenger or LCS
karma is certainly strong in LCS.. but she is BALANCED everywhere else.
i would hate to have to have more mains such as go through what
other 
mains
mains
and 
mains had to go through
because it just isn't fair to us
Upvote because Azir main.I understand you.
Karma's RE is just way overtuned right now and her snare is a death sentence late game
