I main Teemo for all lanes but jungle. I would love to see on his E to remove the impact poison damage and increase his AP ratio for the DoT poison damage. I feel like this would help with his sustain damage on multiple targets and gives great single target poke,I found Teemo is a champ that works great if you switch targets a lot (that's how I have found he works great in team fights).
Passive is fine but is tricky to use can be game breaking is other team is not used to Teemo, otherwise its a passive that is obsolete.
Q Is fine since it only disables auto attacks and in all reality there are very few champs that only do damage thru autos (Tryn, Ashe, Cait ...thats about it, most adc's have heavy damage skills that are unaffected by blind). Would love to see another poison DoT here but everyone would complain so no DoT then...but again would love to see it.
If this has to be changed then let it just be a nuke with additional DoT (drop the blind but add a heck of alot more damage) or if you really want to have people piss and moan make it a silence instead.
W a smaller burst speed with a shorter cooldown would be good for both teams playing with and going against.
Or hey even better, passive no longer drops on damage and instead of an active speed increase he can break and is immune to taunts snares and stuns for 2 sec but is still able to be supressed (WW ult, malz ult,etc). keeping his speed is good and people dont have to worry about him just bolting off, but still gives him some sort of utility and def. (i like this the more I think about it.)
E as I stated get rid of impact damage and give it better ratios, possibly give him a 10sec burst active like Cassiopeas E but with only reapplying the DoT instead of lowering the cooldown.
R Less skill damage increase AP ratio more visibility and larger area of effect. Crap I would like even just more visibility. Max 7 on the map would make going against Teemo a little easier and forces Teemos to make good placement choices.
I feel like these small changes really turn him into a true harass champ.
The thing with Teemo is you need to harass to make sure your team is ahead, that is how he contributes the most early game harass so there is no fed late gamers on their side.
All in all its not much of a rework just small changes.
Tell me what you think, do you like?