While you are at it:
If ents stay put too long (idle) in outworld room, they should grow roots thus
making it impossible to move without the help of skilled merchant (or
armageddeon ofcourse).

Ents with burgle arms, should be able to use the burgle arm as torch, thus
disabling the other use of it. Ambushed ent could drop all the leaves(not
usable by wintertime) to confuse the opponents and flee the room, this should
also put ent in wintermode.

If ents become fire wood if they dont drink. Them they should rot if they dont
eat.

A rotting end would lose its arms and legs, and until it got some nurishment
wouldn't beable to grow them back.

Of course when your arm or leg dropped off all the eq attached to it would
fall to the ground aswell.

One uptune too!
Ents should be able to fill the firewood racks in ships from theyselves,
similar to ducks who allready can use their own feathers to boost up ship
speed.

Obvious downside on that "uptune", clearly any ent sacrificing a part of
himself to fill up the firewood rack whould lose size.