Sova is pretty balanced so there’s nothing to change.
The Skye buff is odd. I think Riot prefers to have agents slot into their own niche instead of seeking out an even “power level.” It’d make more sense to make her dog the recharging signature and have her buy flashes instead. This gives her a stronger presence as the only agent with potentially 3 drones in a round. Your change would force her to decide whether to use the flash for info or to initiate fights which would just make her weaker than Gekko who can do both at the same time.
Gekko already has his own niche and your buff makes him oppressive during pistol rounds but weaker on gun rounds due to the windup. I think a better change would be to remove the possibility of teamflashes and increase his ultimate by one point since that’s what makes him noticeably stronger than his peers.
I like Fade’s prowler buff but it nearly makes Skye’s dog obsolete. The windup for the seize is also necessary because it forces intelligent usage for maximum value — lineups with re-activation for vertical drop — instead of just chucking it down a lane every round. Near 0 windup makes the seize more oppressive than any molly for stalling pushes making it nearly as bad as a deadlock seize but with the added bonus of instakilling anyone caught with a nade/molly combo.
Kayo fragment buff makes it strong enough to break KJ lockdown alone. It needs to be tweaked. I’m cool with the suppress nerf though.
I think a Breach wind up duration buff is the right direction but done in the wrong way. Instead of making it harder to dodge, add an alt fire option that sends out a delayed flash by 0.75 seconds, allowing you to better play off of it with your gun out ready. This gives you the option to swing as the flash is being dodged, allowing for solo playmaking.