Please rethink making MP a cut-down version of SP. At the very least, make a co-op mode with all SP functionality, and how about having battles involving more than two sides? What about allies being able to join in battles with their team-mates? It would be fantastic if you could balance well, having 2 players vs 2 players in the one battlefield, for example. And this would fit a lot better with Elemental being a game that suits co-op MP much better than competitive. 
What do people think?
Best regards,
Steven.