Yep, more combat variety is needed. That's a big part of the reason we're in beta, there are a bunch of things we still have to do . Variety in monster abilities, in maps, in mission goals, all that stuff sounds fun!
Dungeons - we'll see. We have some underground battle maps now, but as for more extensive dungeons, it's not on the immediate list. But I think it would be fun to think about it later on. Maybe multi-part missions, that sort of thing.