I only dip into CQC occasionally these days but I used to play it a ton (and moderately well), so I definitely have Opinions.
1. Powerups are fine. Fixed location/duration powerups are a steady staple of arena shooters since Doom, and so are the meta-games of denial and control that revolve around them. That said, a few judicious map tweaks for powerup balance would be nice, as would tweaking duration/cooldown numbers. Some extra match options to shuffle and/or randomize powerups in various ways could be fun. And it would help new players a lot if WEP made the ship holding it glow red or otherwise be really visibly and obviously buffed. ...but IMO this isn't even close to the top of the list of issues "holding CQC back."
2. I agree that current rewards don't do CQC any favors, and seem like really low hanging fruit to increase even modestly. I'm on board with most of the ideas under this heading. (As an aside, I'd love to see dynamic conflict zones around space installations that are zoned to only allow fighters-size ships, maybe tied in with Frontline Solutions... not technically CQC but it could get some of the best bits of it into the main game).
3. Expanding the set of ships would be a Nice To Have, but each new ship makes balance that much more difficult to get right. I don't think this should be a priority.
4.
IMO the most helpful addition to CQC today would be bot support. CQC is most fun with real humans that are about the same level as you, where you can give approximately as good as you get. The player pool has never been big enough to reliably sustain that ideal for all timezones, though, and it's only gotten smaller over the years. If you can find a match in reasonable time at all, it's unlikely to be satisfyingly balanced. Bots fix this, especially if you can elect to play
only against bots and not have to deal with the only other players online (if there even are any) being way above/below your level.
Of course, if FD had an AI that could satisfyingly navigate CQC maps, they'd probably have implemented it (as well as Installation CZs) by now. And I can't imagine it's at all an easy task, having worked on some such things myself.
But all this presumes that FD
want more people in CQC, rather than regretfully hanging on to it because they can't quite bring themselves to just get rid of it. I don't think I'd be too upset if (for example) they sunset CQC in favor of similar experiences in the main game, like being able to go do fighter battles around real installations via Frontline Solutions.