I understand that the interface is a direct port from the alteil 1 japanese engine. But if we could increase the speed of gameplay I think alot of veterans as well as newcomers could appreciate that.
My suggestion (while without coding) is to have the game not exactly be as animated when showing reduction of sp or damage lines above the cards. Rather I think a more effective manner could be too have something like a line of text in the middle of the screen that displays all the changes and just have thinks like SP gains or losses instantly be displayed. (tag along an in game combat log of sorts) and the time it takes to play a game could be cut down significantly.
Just a thought. I love this game but I know it can take a while to sit down and play a couple games.