Another observation - this increases an already awkward situation where a CRJ-900 (14.3% FC), EMB-175 (15.8%) or even a CRJ-700 (13.8%) all appear more attractive to an elite looking for a complimentary upgrade than the A319 (previously a competitive 12.9% FC, but now only 9.5%).
Given that scope clauses appear to be a top negotiation point for employees, I'd be surprised if this doesn't also cause internal pushback from regional flights being made more attractive than mainline flying to frequent fliers. It's a real concern - why would I take DL2550 on an A319 at 5:30 PM SEA-SLC when I could take DL4567 SEA-SLC an hour later on a CR9?
I'd love to hear the official take on why this change is being made from SkyMilesInsider...