Since Axman kindly donated a copy of the Persian map to the dedi, I put a new mission up to test it all.
Upon joining the dedi in MP, I noticed the ping is very much higher than the Caucasus map (490 against 235) and also joining was slow or hanged-up. I could only (at the first try) get in as spectator and a second try got what appeared to be a frozen screen.
So it appears the Persia map uses more memory or are the above related to something else perhaps?
The mission doesn't crash on the dedi and shuts down properly -it also didn't record my name only saying 'unknown' joined server.