I have some thoughts about 3 legends in particular.

First things first conduit has kind of been neglected, she needs a buff. But just a minor one. Let's say both of your team mates are right in front of you, conduit has two of those things on her back. You should be able in that case to charge both of your team mates shields. Either that or have a permanent two tac charges. 

Second mirage needs a major nerf. That guys whole gig is decoys, not going invisible. He pops a shield, he goes invisible. He sends a decoy he slightly goes invisible. He uses his ultimate he goes invisible. And most irritating of all you knock him, he goes invisible. The last one gets me the most cuz no other legend has an ability triggered by them being knocked.

Third is caustic. This guy is irritating as all get out, especially if you're playing wildcard and have 3 of them on a team. He has sooo many traps. And when you have 3 it's ridiculous how campy people are. He definitely needs a nerf. But not in the way most would think. Let him keep all his traps. But allow his toxic gas to be caught on fire. This could also be a buff in some cases, but would force people to play caustic in a whole different matter. Would encourage people to think about how they use their traps instead of hiding in a single room the entire game.