Do you see how, as predicted, we went off topic to discuss the Chaos 3.5 ad infinite? Mebbe the OP had a point...
The only thing I bemoan from 3.5 was all my cult squads numbered for the gods for a free champ. Was it OP I took 6 noise marines and got a free champ? It was a trifle awkward getting back to 10s for later editions...