Just because you replace it with a damage scale doesn't mean units will start moving in turn mode.
The elves will still shoot several times before the zombie's turn arrives. And I consider turn-based combat to be that type of battle where, for an already active unit to get another turn, all other units on the field (both own and enemy) must also have moved (unless, of course, they are affected by low morale or are under the effect of a spell).
I don't know about you, but personally, this doesn't bother me much; it will only make playing more interesting (IMHO)
I'm more concerned about where Sandro came from in the hero description...