Quick morale question
(BI v1.6, Epistolary Richards make_all_factions_playable mod (updated rebel_commander version)

I have a situation where I have a Saxon general with "Shieldbiter" trait besieging a town. I am about to get sallied on. I have another stack with a "good defender" general nearby, who is out of move points (can't trade generals this turn),but close enough to reinforce.

My question is, if I withdraw the shieldbiter general while leaving his army in the battle, will the reinforcing general be considered "in command" of the original stack, thus negating the defensive morale penalty from the "shieldbiter" general and applying the defensive bonus of the new general? Also, will the original stack's troops take a morale hit from the general's departure, and if so, is it as severe as the penalty for the general routing or is it a lesser penalty?

this probably belongs in the Ludus Magna, but I coldn't find any threads on morale there.