Great new concepts. Hope that other developers will learn something from the parachute aspect. WWII is new again.
Some of the battles that take place, even thought we've played most of them before, have a different feel. This is most likely simply because you approach from the other side of the battlefield. There are many great challenges to keep you coming back, such as the skill jumps (difficult to hit landing zones marked by snagged parachutes) and weapon upgrades earned by an experience style system that advances as you use a weapon.
Overall there really isn't much that could be improved. The only things that are lacking are a co-op mode and a lobby system for the multi-player. Other than that EA has breathed fresh life into the WWII FPS.