Choon, don't forget you can break walls as well (only the walls to Lilandra's room is unbreakable).
The main reason I think the RPSC turn limit is 15 is to limit how many injuries the hero team can get. That, and to keep the games running quickly. So I am fine with extending the turn limit to 20 if the hero team is. However you still have until the end of the month to finish the game. I want the RPSC to start running regularly, so I'm going to be stricter on that now than I have been.