Karma Sucks Right Now
Karma is a terrible champ right now.
Support Karma As far as support Karma goes she has to win lane before level 6 or she loses. All you have to do to beat a Karma support is to play relatively passive pre level 6, then all in at level 6. That's it, gg, you win. It's not like she's super dominant pre-6 either. Post 6 her Q damage starts to fall off because she's not building AP. Her utility is pretty piss poor. In a world with Righter Glory, Talisman, and Sivir ult exist it shows just how weak her empowered E is in comparison. Her peeling is mediocre best. Her Q slow isn't strong and her W takes a bit too long to actually snare. It also doesn't have pronounced visual effects to show everyone that the snare goes off. IMO, she's easily the worst support in the game. An absolute joke right now.
Mid Lane Karma Her solo lane bullying on the other hand is ridiculously lane dominant. She's easily able to land RW combos on the enemy because it's a solo lane and she doesn't have to worry about support/ADC autoing her down. She's one of, if not, the absolute most dominant lane bully in the game due to her ability to poke and her heal/shield speedup. So what does she offer after laning? Not a heck of a lot. If the enemy mid survives and doesn't die she offers a 30-40 cs lead on the enemy and low amounts of utility. Her RE combo will be a little stronger with the shield, but it'll still be a shitty speedup in comparison. Her Q is medium range and rather risky to use as a poke tool in a siege/counter siege situation. It's also not a very good waveclear ability. Then you're still left with a shitty RE speed up with a better aoe shield on the level of locket. So her solo lane is pretty bad unless she snowballs the fuck out of the lane.
With all of this in mind, I'm so glad they're buffing Karma's shields and cooldown refund. She'll have Lulu levels of cock blocking shields that might actually be stronger than Lulu due to higher AP ratios. This also synergizes better with juggermaw because of Janna's shield and the amount of shields Karma can put on a single target. I think they should nerf her early game power in exchange for a much stronger mid-late game.
TL;DR Karma relies on snowballing prelevel 6 in order to be a useful champ. The only way she can reliably do this is by the enemies' ignorance to this fact. Her post level 6 is shit and she does nothing better than any other champion. The proposed changes are a buff to her mid-late game.
