…of a thousand(!) people in the case of a galaxy class. Only 300–500 are needed at the same time to operate the ship. Even in the 24th century, people need to sleep.
You are perfectly correct. I do not miraculously clone people, because there are already enough on the ship. In case of a Galaxy Class, at the risk of repeating myself, one thousand. Only 300–500 are needed for normal operation mode (cf. e.g. TNG 6x10, Chain of Command, Part I). I do not need to clone, since it suffices to just wake people up. Just a sidenote on that: Not all personnel off-duty is sleeping. Normally, in a 3-shift-system, which Starfleet normally seems to use (cf. ibid), one shift is working, one shift is off-duty but has to be ready for duty if needed (sorry, there is a technical term for that that eludes me) and one shift is sleeping. So, technically, I even do not need to wake people up. I just need to use shipwide comm to – anounce somewhat even less than a all-hands-maneuver.
I actually have two bridges on a Galaxy-Class. As shown in even the pilot of TNG, if I remember correctly. With consoles, and all. As I already stated, the second bridge seem to be fully-operational. Thus, when both bridges normally can operate up to the full 5 points – why shouldn’t both bridges, given an all hands maneuver (I would argue that only a “two-third-hands-maneuver” would be needed…
) is commanded (in the peril of battle where we need to separate the two sections…) operate at least four ships? This already takes the “cuts” of crew into consideration.
Would be perfectly fine for me. Even adds “realism”, so to speak. I would completely be up to it and would demand momentum and/or threat from my players, if this mode of operation would last for more than just a few hours (meaning: one shift, to be precise).
Anyway, you need not be convinced by my arguments. And I have to admit that you do have some fair points. But I would, in the end, argue that in a game where we play breaking the light barrier every other dice roll without a second thought, these simple considerations taking actual navies’ operation modes into account, are reasonable enough to allow operating 8 shuttlecraft from the two sections of a separated Galaxy-Class without shattering the suspension of disbelief.
But that my be only my opinion. 