Let me get this straight.
If a character joined a unit during the character movement part of his previous turn, and is still attached to that (or another unit due to applying rules on terrain) unit at the start of you (current) command phase, he gets a +1Ld when commanding that unit, or the brigade the unit is part of.
Positives:
- easier to bring up reserves, which for undead can be a bother
- easy to identify
- nice way to represent something that is fluffy
Negatives:
- attached characters are vulnerable
- make it +1 on Ld for commandrolls involving the unit joined. Remember the characters is NOT moved with unit, so that helps keeping track of it.
Rules considerations:
- Characters can not be joined to units during set-up, so no unfair 1st turn effect
I guess I could live with this