Well yeah, its an EA published game so MS wont have any responsibility in getting a patch for its many issues.
I would be surprised if you got any reliable news from a telephone call with EA support.....no news has been posted on the official site, any of their Twitter accounts or any other gaming sites
There is no news on the patch sadly, it could be with MS for certification, it could well be up the developers a-holes.....fact is, we wont know about one till we fire up Crysis 2 one day and it stops to update itself, then maybe a week later someone will post the patch notes explaining what was in the patch/update
Its a sad state of affairs that this is how Crytek choose to show customers their support, enough negative threads and requests for patch information on this site alone should have been enough to get some sort of definitive answer but know, no one is talking, the site admins here cant even get the information from the depts responsible so I doubt a phone call to EA will get you what you are looking for
But good luck, you never know till you try