Multiple, Frequent Crashes

Hi there, since I started playing about a month ago my game has experienced the occasional CTD (no error message) but typicaly only in quite heavily congested areas like major cities (but on rare occasions in other, completely random places but never in dungeon/trial instances). This obviously made me dread ever having to go to near a main city aetheryte for whatever reason (not a great situation for the most communal areas in the game).
Recently though this issue has stopped me from progressing in the main story as everytime I try to initiate the cutscene during the 'Gosetsu and Tsuyu' quest my game also CTDs. Previously my game had gone to an infinite loading screen on at this point. I also had a similar issue upon trying to visit the 'prima vista' for the first time which prevented me from logging in at all until somone suggested I world hop from the login screen to boot me out of the 'tiring room'. So far I have tried all the 'usual fixes' including: un/reinstalling my game (several times), shifting my game to different drives (cant run on C drive as I simply dont have space), turning off all overlays/background processes, trying a clean boot, running in DX9 mode, deleting my character data folder, updating and rolling back my graphics drivers (several times), running the game in different aspect ratios and turning down all graphics setting to minimum.
The more I try these 'fixes' and the more I read of others with similar issuses the more im convinced this is a problem server side, though i've yet to have a chance to play on different hardware to confirm 100%. As tickets seem to not being responded to atm due to high traffic any help here would be appreciated.