missiles/cannon ammo - this is not used in battle, thus can't be ordered after a battle
My bad, misread OPs post. Would be nice to have a genral resupply option for crafts though...
grenades - in February, you should be using alien grenades already
HE packs - possibly, but I assume most people use alien grenades instead
HC/AC ammo - possibly, although in February you should have Plasma already, or at least Lasers
AFAIK aliens have no weapons that deal incendiary damage either - these are all bought. You are also making a lot of assumptions of how people "should" be playing the game. No offense, but maybe i am not that fast on my playthroughs? Maybe some of us aren't as lucky with their aliens and loot drops? I've also heard that some people like
to limit their use of alien equipment. Again, i think this would be a useful funtion to have in the base game, but since i have no idea how to implement it all i can do is come up with arguments why such a feature might be a useful addition.