Twitch Currently isn't a great adc with the tank meta, but his passive could be changed to improve that: instead of doing true damage, it could apply % damage per stack, even if this is .5% , it is still better than true damage, which can't even get through some of the tank's shields. This could show a lot of play out of a champion with great potential.
this would rather be a nerf. in lane, you get 12 true damage from one autohis pre lvl 6. 0.5% max HP (MAX HP, not even current, MAX) would be ~3 (assuming ADCs have ~600 max HP which is average at early levels i think)
thats nothing. and if it scaled up, 2%Max HP late would be too much. it would stack up to 12% max HP which easily is a few 100 dmg to a tank but still not much to a carry.
his playstyle is assasinating people pre-teamfight and then getting objectives/winning 4v5 teamfights. this would make it even harder
twitch benefits moreso from this tank meta than he did before. it gives him the needed peel to throw down all his stuff and stay safe in the back line. 2 steroids and a pen build + a piercing ultimate gives him more damage output in team fights than any other adc. hes much more capable to put out than before. his problem is just getting to the late game team fight scenario with one of the weakest laning phases.
i can understand you want more of an assassin twitch who just pops up where he pleases and picks off a carry and hes "done his job, of carry for carry" and hopefully you put out a little extra before you die, but hes capable of so much more.
