As a mastery 7 teemo and long time player, i was just wondering if he will be, or could get, any small buffs or maybe a small skill rework or update in the future. i love teemo and he is my favourite champion, however he is struggling to hold up in any game as of recent. He can be very powerful if he gets ahead, but this is a rare occurrence now. Im not asking for anything huge, maybe just a tiny update to his sprint or something, like how you added bouncing mushrooms. 
Probably he needs some sort of rework. I assume his kit is very hard to balance. Personally, whenever I see Teemo i know his team will lose regardless if they were ahead. Same happen in my last game, Opponent team were destroying us while early game Teemo killed 2 top towers. They had a huge lead and yet they lost late game because Teemo is terrible in team fights. http://matchhistory.eune.leagueoflegends.com/en/#match-details/EUN1/1664711320/30003253?tab=overview
I worked with some ideas myself about a Teemo rework. I was thinking, he would be very interesting if reworked into a support role similar to Ivern, where his role actually was more about scouting and vision and protecting against ganks. Peering down lanes, revealing sections of jungle, or even blocking off certain paths with harmless pitfalls rather than damaging mushrooms, so that any opponents trying to escape through jungle would be hit by a stun instead of damage. I think he'd make a really loveable and endearing scout champ who people want to root for as the Little Guy Who Could.
I know what you mean about him being hard to play toward effectiveness. Just today, I was playing among low level accounts, and somehow at a low account level, Teemo's abilities make him stand out as a monster on the field - probably since everyone's MR is so low at that point and a lot of players just follow the recommended build paths so they get obliterated by Teemo's darts and then go on to join the bandwagon that calls Teemo 'Satan' even when for real players, Teemo is easy enough to handle and it's mainly just selfish Youtubers who make a big exagerated scene in order to drive up their viewerbase.
Once everybody is at level 30 and has a standard rune page, suddenly Teemo's power drops off pretty drastically and he's only left as an occasional annoyance or an OP fed champ in those few odd matches (but that goes for any champ that is played off to an amazing start).
I also love Teemo (Although I haven't played him in awhile) but really he is generally considered weak as you say. Some little fix or change that could be done might be with his passive. I have read suggestions before on what could be done, but even if we could do something like this;
PASSIVE: While standing still he becomes invisible (NO change here) However add in; Teemo's passive also activates while moving through bushes. He is revealed in the bush if he performs any actions (2 second cool down)
Something like this wouldn't make it OP or broken, but it plays off his already known passive and it makes sense. A little teemo running around in the bush would be hard to see or catch compared to a normal size champion. I dunno, maybe I am rambling at this point lol.
NO GOD NO
Even just a buff to his W in the short term. I can't think of a weaker ability in the entire game.
