Nope, but they'd either have to a) fly more or b) pay their pilots to fly more, with those hours being at the top of the scale, rather than in narrowbodies.

As for other frequency reductions, I thought the same and looked it up. For now, MSP keeps its 3x daily, DTW keeps its 4x daily, PDX keeps its 1x daily and SEA keeps its 2x daily. I didn't check ATL or JFK, but we all know Delta never reduces frequencies in ATL and a drawdown in JFK in favor of SLC seems really unlikely. Subject to change of course, but I think this is a new frequency.