You CAN play DA: I as long as the game fully loads and connects to the EA DA: I Servers. I received the entire Dragon Age: Inquisition game with all DLCs about 9 months ago from Epic Games for free! I never even heard of Dragon Age anything which also means I never played any of the predecessors or saved anything to the Dragon Age Keep! I have played DA: I completely through far more than 10 times now with trying different Inquisitor Races, Classes, Professions, and Specializations. Nightmare level with Trials (Walk Slowly & The Grizzly End) activated is a freaking blast but prone to be a little buggy!
I launch the game with my Epic Games Launcher, then wait for it to connect to the EA Servers before the BioWare DA: I Main Menu Window appears and simply select CONTINUE if I had a game crash and hope the game progress was properly saved seconds before the crash or select LOAD if I experienced a "Sit in Judgement" (known black screen bug - save game immediately before sitting for a workaround) Also save game immediately before talking to Cullen for the first time in Skyhold (another black screen bug).
Just do like I do and ignore the Dragon Age Keep saved World State and play the game using the DEFAULT WORLD Setting.
Good luck with getting EA to unlink your old email address from your X-Box Account. I've never had an X-Box, never played on one, and don't even know anybody who has; but it occurred to me - If you can't get EA to unlink your old EA email address from your X-Box account, try contacting X-Box Support and see if they can unlink the EA account from their side or help you transfer everything to a NEW X-Box account for use with the NEW EA Account.
