This just shows that Alex is the ultimate troll. Thread after thread asking for more groups, nothing, here comes Gothars proposing a solution WITHOUT adding groups, and kaboom we get 2 more. Truly the work of an evil mastermind.
Just kidding btw, reaaaaly appreciate the huge QoL change, plus the redesign of UI. (It's painful having to play the cirrent version when so much great QoL stuff has been already implemented.)

(Also, sorry! I can totally see how that'd be.)
I mean, I just changed some vars on a whim from private to public static and blew saves, so... 
(So long as it's not "final", those are like a giant middle finger to future you...)
Yay.
It might look like a small change (for the amount of work it cost you) but since this mostly affects "end game" ships like the direct combat capitals i think this improvement might be a lot bigger than it appears at first glance.
(Could feel really restrictive to outfit or pilot them, made worse because the restriction was artificial.)
*thumbs up* I'm happy with the change - and especially with bringing the weapon groups dialog UI up to what the new standard/look and feel is - just had to happen at the right time!
e/ And just to immediately dispel any potential illusion that ...certain elements of the community will ever be satisfied and stop trying to make Starsector better: While you are working on it, how about a toggle in that UI to make a group fire directly when selected? That also comes up since, like, 2011^^"
Hah! That's actually a good bit more unclear. How does the AI handle it? If it just ignores it - which, after all, it can use alternating groups pretty well, so it doesn't really care - then it feels like it's breaking the rules as far as using a ship in a way the player couldn't. Also, how does this interact with linked/alternating? Sometimes you'd want all missiles to fire, sometimes one. But if it's alternating, you couldn't switch to another missile, so that's potentially awkward. (But, ok, that could only be a useful thing for mono-weapon-groups.) Still, you'd probably need "select-fire-linked" and "select-fire-alternating" modes. But then, how do you see how much ammo is left if you can't select the group? It's just a huge can of worms on a lot of fronts.
Having a separate bind to insta-fire a given group gets around these problems, though... but then the question is, what binds would be ergonomic? Pretty much everything around WASD is already taken, and you'd really want this to be super easy to access. Even if you, say, decide that only two groups - 1 and 2 - get "quick fire" binds, still not sure what that'd be. Something like Alt-<group number> is awkward enough that I think it defeats the purpose. Q or E I think would be ideal, feel-wise, but then strafe left/right would need to move somewhere...