For the Battleships and CV part, and land bases - Admiral/General stuff, how's this?
Where he lands determines what he brings?
This method wouldn't change any thing at already exists, it just adds a Battleship or bunch of wirbles, 88mm guns pulled by trucks(?), anti tank guns pulled by trucks(?).
Arrival:
So someone at a land base, ups in a c47 with the Admiral/General on board, lands him at a CV, and INSTANTLY(?) a battleship appears in formation with the CV, regardless of if the CV was blinking or not, or already under attack or not. If he lands at an airfield or vehicle base, blinking or not, he instantly brings his support group, spawning at their 'automatic' places, depending on the type of base.
For in combat:
Technically, he would station on the CV, even though the Battleship comes with him. So he is located in the hangar as a 'load' for all to see.
(As for who can load him is another topic)
The battle:
Anything that gets sunk... he automatically transfers to the next largest ship of the normal convoy, still appearing in the CV just like a normal dead CV, we can go to the hangar, we just can't up.
So to actually KILL HIM, the ENTIRE CONVOY would need to be DESTROYED, if someone tried to escape with him, then that vehicle or plane would need to be destroyed.
When CV's get sank, there is a normal spawn time before the whole thing gets re-spawned back near its port. IF the CV is dead, and the time expires... then, if even one destroyer was still alive, the General would spawn back to that CV's home port, with the new CV, which would have his Battleship with it, in whatever its condition was.
Hence: Yes, every LAST ship of a convoy would become subject to destruction! Better believe it!
Departure:
If the convoy is NOT blinking, then, if someone loads the General, and takes off... the Battleship INSTANTLY disappears.
If the convoy IS blinking, and someone loads him and takes off from the CV in a plane or even a PT Boat, then the Battleship stays there, in combat, until sank or the CV stops blinking.
If the General/Admiral is not on board, and the group is NOT blinking, then yes his support group INSTANTLY disappears.
Arrival:
He has to at least get a ditch, as in land closer to a friendly base or CV, than any enemy base or CV.
If he was in a loaded on board a PT boat, presumed from a dead CV, he has to get within range of either a base or another friendly CV, to get a 'successfully landed' and without an enemy anything within range of him - just like when driving a tank and hoping to get a 'successful landed.'
What he brings:
If his Battleship was burning; then, at the new cv, his Battleship would be in the same condition, burning. And as anything else, it gets repaired with time.
If he goes to a friendly Airfield, or Vehicle-base, then his 'damaged Battleship' becomes a 'damaged support group. Which also would full up, over time, like a de-acked field.
Hence: where he goes, determines what he brings.
If he lands at a CV, he brings a Battleship, if he lands at an airfield or vehicle field, he becomes his normal support group.
Would be a couple of dozen possible achievements and perk awards for any of this by the way, conditions dependent.