It would be nice to get some smaller maps or just maps with fewer camping points for battle, since it often takes ages for last few guys to find each other. Also, it would be nice if you could stun people who are aiming when you walk into them. For some reason it seems like switching to melee mode makes you run slower than when you're in ranged mode.
When it comes to mortars, it would be great if we could aim them with arrow keys, since that would require more skill than just point and shoot, it would allow mortars to fire from cover, instead of mortarmen being target practice for snipers (although that could ruin the balance somewhat). Also, this is simply superb mod