Yeah. It’s just one of the main things that can make fighting wiedergangers challenging (i.e. you’ve already killed most of them, but you’re a bit fatigued and there are still some fresh, more heavily armed ones approaching, and then half of the dead ones arise into melee with your archers who’ve moved forward).
Personally, I just wish that all wiedergangers were possessed by a necromancer and had doubled action points, the Pathfinder perk and +15 eyesight (effective in the dark), so that battles could be joined and resolved quickly.
Oh, and give them all the Impatient trait as well.