Playing through the new maps by myself atm just to get to know them better i.e. what routes to take etc. and I found a "secret" way onto the D flag on caspian, at least I haven't seen any videos or anyone else do it yet!
A few other ways to get pass the wall as well and tested what I posted last night out, takes 2 sabot shells to bring part of the wall down so def. don't need to stick to the 2 tiny doors.....
You can show me if your on later!