From my perspective (and not just mine): it would be great to introduce a timer for actions in battles against an opponent. People who spend 10+ minutes setting up their tactics and then spend another 10+ minutes deciding whether to cast a mass spell or a mass shield are incredibly annoying. Moreover, this completely kills the excitement of the final battles, and consequently, the entire game.
I agree with Kostya; even simple final battles can last for an hour or two because there are no regulations, and streaming and tips from other players don't help speed up the game. As for consistently taking too long to make a move (with a delay of 10-15 minutes per turn), it is definitely necessary to report such cases to the AC (Arbitration Committee)!

