Good. I love the 757s, but the airbus is a heck of a better solution than some dinky overstretched 737s...
I don't think there's enough of a market for the NMA, it just doesn't make sense. A lower OEW/MTOW 787 variant (e.g. a 783 lite) would probably be more effective. Until they do finally replace the 737 with something that's a step up, in size/range but that's like 30 years from now...