A350 for JFK, ORD, BOS and YYZ, R's for west coast and MCO. Sounds about right. Begs the question what will happen with the SNN flights when the 757s are gone, if an A332 is too much plane for SNN....
Wouldn't it be the other way around for the A350?
A350-900 for west coast, possibly further afield while the 900R (Regional) which has less range and lower MTOW would be used for east coast.
Aer Lingus say they are looking at what to do once the 757s leave, Airbus will be under pressure to deliver the range on the A321NEO. I think the 757s will be around for a lot longer than the current 3 year contract though.