Does the holy trinity of AD carries become a holy... quadinity...?

quartet?
is that the word you are looking for?

I've been screwed because off this before
bump
also....

damn you...

2 talons posting at the same dam time.

The big 3 are strong at all points of the game because their abilities remain relevant to make up for their auto attacks, until they have enough items to make their auto attacks strong. Tristana's abilities don't scale with her, so she tapers off mid game until she gets a few big items. Mid weakness is extremely crippling unless you can stall like CLG.eu, which isn't going to happen in solo queue.

The clunky jump isn't her problem. Hell, once she hits 6, she's one of the safest in lane, and at 18 I'd say she's the safest carry.

Her casting time is what allows her to dodge Blitzcrank grab

They can go either way on this one. Either they need to make it function as a jump (so she can't be knocked up when shes in the air) or change the animation to make it look like the dash it currently acts like.