Nahh. Pull together some silliness ripped off from Brand W and "how it ought to work"; Now do this:
When a ship is sunk, it respawns back at the port (maybe with a 15 minute delay x a multiplier for the damage status of the port). All respawned ships have their defensive systems disabled until the TG reforms; the CV has flight ops suspended as well. (this can be justified any number of ways, but is designed to prevent the awkward situation where a port is captured, but the TG isn't).
Enable a TG command "RTB" (or "RTP"), that, once enbaled, locks out any would-be admirals, and forces the TG back to base, at which point the TG is reformed with the rebuilt ships.
When the carrier slowly slips beneath the waves, RTB is automatically engaged, and the remaining ships go home (and the rebuilt carrier has flight ops suspended until the TG is reformed).
If the whole TG goes down, it reforms at the port.
That will make losing the carrier a nasty thing indeed, and at the same time avoid the current confusion and unsatisfactory "where'd the fleet go?" syndrome.
Oh, and for those of you hankering for a separate cruiser for shore bombardment, think of this: Provided no planes are enabled for takeoff or landing, from my outsider's perspective there is no reason why a TG has to have a CV in it. We are going to have some fun when the post 1.05 map builder comes out.