Such a great map! I love the size and lushness of it.
It's hard to defend. One reason is that the caps are far apart and it's difficult to get people to them in sufficient numbers. You're spread thin, so it doesn't take much for the Allies to take control.
I'd suggest moving the Axis spawns a little closer or Allies back.
Maybe a shorter cooldown for Axis mortars? Is that possible?
It's tough for Axis to get to the Tunnels at F (I think, the one in the gorge) once the Allies move up slightly, so there's really no fighting in the tunnels or the gorge. A couple of people take it.
The bridge needs to be more difficult, it's one of the easier caps and since it's the last, it should be epic. Clear out some of the Allied cover?