Right now yoru is one of if not the worst agent in the game and i think it's because of how his abilities were designed.
Signature ability - Gatecrash
I think this ability should make less noise when teleported so that it isn't blatantly obvious were you have relocated to. This would help him out at being more stealthy (as he was supposed to be)
Also either the duration of the teleport animation should be reduced or you should be invulnerable when teleporting.
Ability 1 - Fakeout
I have no idea how you would improve this its just really bad
Ability 2 - Blindside
No improvements needed here I don't think its a perfectly viable flash
Ultimate ability - Dimensional drift
Right now, this ability is basically skye's dog but your life is in danger when the duration runs out
I think the noise radius of when exiting the ability should be reduced.
Also a unique addition that I sort of came up with would be maybe when you walk through people in your ULT they get "marked" and upon exiting the ULT marked enemies will be concussed or be affected by some other debuff .
I just think it would make his ULT more of an ULT than just another ability idk.