After some more game play on a 32 player server I have made some more modifications:
Stage 1
- changed choke point arch into a building structure to allow an alternate flanking path in the same location
- changed / modified center arch near red's final spot and cart path (minor change) to cut down sight line and make it easier for blue to push the archway - they now have some more cover.
- modified red sniper tower so they can't hide in doorways as much, the new flanking route will allow blue snipers to counter snipe more as red team snipers will now have to cover multiple angles instead of just focusing aim to specific locations.
Stage 2
- split part of blue's mid point spawn to divide red's pressure on blue middle spawns, blue can now attack red's final spawn more directly from another angle and take some of the pressure off their mid point.