I don't imagine that it would be a quick fix. but to emphasize the importance (in the hopes a dev reads this) imagine half the spells coded, animated etc being worse than pointless. While a min-maxer might learn not to take or use concentration spells and likely end up finding the combat system much more shallow than it could have been, a more casual player is going to experiance extreme frustration by the 5th time they cast enlarge person, only to deal an extra 2 damage before losing concentration.
