One Giant Leap for the Bandle City Gunner

This is my first discussion-related/gameplay "suggestion" post, and I'm still relatively new to the game (6 months, give or take). I've noticed there seems to be a general consensus that Tristana is "okay" but "outclassed by others in her lane" (with Cait and Vayne often being cited). Tristana is one of my two favorite bot laners, but there is one thing in her kit that has always bothered me, and herein lies the suggestion:

When Tristana is in the air during her Rocket Jump, she should be untargetable. I didn't even realize she wasn't until I was nuked out of the air one too many times. It's one thing to have an attack that already locked onto you land (that terrifying moment you realize the final turret blast is following your arc through the air), but if Fizz can hang out 3 feet above the ground on a pole and be completely missed by Jinx's gigantic missile, then Trist shouldn't be shot down for leaping over Vel'Koz's W (which only affects the GROUND).