Kind of a different focus of changes than other people... Helix Rockets. A lot of people seem to be convinced that S76 will see his primary fire return to what it once was.
Deep breath...
Anyway, my proposal for Helix Rockets some give with a little take:
The changes above would be a net upgrade to skilled S76 players that can land direct hits with the Helix Rockets but remain a relatively benign "sidegrade" for lower skill players. They can fire more often and the rockets are easier to hit because of their increase in speed but poor aim is penalized for the increased opportunity to spam.
Changing the core gimmick of his gameplay is never going to happen. He's sustained damage. But the rockets are supposed to be his finisher and giving him more opportunity to fire them would be a big deal. Additionally, a 6s cooldown on Helix Rockets would mean that there's almost always a chance to use them during Tactical Visor, which has a 6s duration.