i think your best bet is to ring any gaming groups you want to go to and ask their stance on it.
from what ive seen , aslong as your opponent says its okay to use dow as a rare choice, its fine.
however after reading through some of the DoW troops, stay away from things that would make your army appear uber cheesey, id avoid using the regiments of the renown , unless your themeing an army around them, as alot seem abit to powerful, and maybe shy away from ever using arsnil the dragon lord , it just seems really boring to take an army like ogres who can win against other armies frequently if you can learn how to play them right, and then slap in a terror causing flier thats amazingly fluffless and can essentially win games for you.
but that said, some units in the dow lists fill specific roles ogre kingdoms cant fill atm, so make up for a weakness with a unit of knights, or a cannon or anything ^^ just make sure its not boring to feild