Learman,
The minimum qualifications are cast in stone and are not waived.
I think your time meets the minimum qualifications. The web site will tell you for sure, We have hired pilots in the past with only RJ time but I am not sure if it has happened in the last year or so, but a CRJ type would help. I would assume that we are looking for a different background for the airbus than we have in the past. You would probably be willing to sit in the right seat for 5 years. A new joiner with thousands of hours on the airbus probably will not be willing to do that. And currently it would be wise to plan on 5 years to upgrade on the airbus.
The FAA ATP is fine with Emirates. It is simply the american version of the ATPL. The difference is that the ATP never expires as long as you keep your medical up. Emirates has hired many pilots with the FAA ATP.
Regards,
330 Man