I like the Trist update! But...
It doesn't really fix any of the problems her kit presents. As an ADC, she still has a knockback and a (resettable) escape. She still has really strong poke early game. She also still has amazing range late game (which would be fine on its own if not for the rest of her kit being fairly overloaded).
I'm sure you guys are going to tweak numbers, but at the end of the day I'm not sure you're going to really 'fix' her unless you're willing to tamper with her kit's identity a bit. You might have to remove her AA range scaling. Or take the reset off her W.
I'm aware she also has an AP identity to maintain, but I'm worried she's going to come back to bot lane and remain as oppressive as ever when she's strong. No matter how good her new visuals are (and they are great), they're not worth much if she's going to warrant a ban every game.
is op shiz