Per my earlier point, an Astral loaded with interceptors is the best example of where it might be useful, and it's
still a waste of an Astral and supplies. I mean, are you really going to want to outfit, maintain, and deploy an
Astral to hunt down frigates and provide fighter escorts?
Still, it's definitely one of the best examples; could also see some other loadouts being potentially useful - such as two groups of 2x bomber 1x heavy fighter, or splitting bombers and heavy fighters to have finer control of the arrival timing.
Again, I'm not saying it'd be 100% useless in every situation. It's very much not clear what good controls for that look like, and then there's dev time. My assessment is that given its limited utility, it's not worth it, and honestly, that's not likely to change without some of the considerations also changing. I may revisit that at some point, but, really... would you want me to do that, or work on something like outposts?
But even that aside, I don't think that finer-grained control would necessarily be an improvement to gameplay, especially in light of what it might cost in control complexity.