I don't think it is a distraction to debate issues which affect customers willingness to buy tickets whose price is comparable and may drive E class ticket sales in a thread speculating on whether Delta will provide more E class tickets. In fact I would bet Delta is looking quite closely at things like this when evaluating E class.

Honestly I think mentioning Southwest should be 'cut some slack' because airlines have problems merging is more of a red herring as I think fewer people will use that as a ticket purchasing metric than on time performance.