I agree with Regenuluz,
either a pause/unpause at will as in Baldur's Gate or stay in turn by turn after combat with an end combat option.
You have to react fast sometimes and the game does not allow to select another character while 1 is doing something.
Ex: while my cleric/paladin is casting heal, I can't select my 2 hander to cast "help". (The one that removes fire).
Imarion
