In PnP (3.5) there were plenty of ways to boost your spell DC. So far in this game I feel like its a total waste to cast crowd control because your chance of landing the spell is like 60% at most. Its wierd that it feels like this because the cantrips (or any damage spell) have similar chance to hit. I guess it matters if its a cantrip that you can cast ad infinitum but even with a hardhitting finite spell I would rather cast that at 60% than a CC spell.