This is potentially good news, but the devil is ultimately going to be in the details - specifically, how Basic vs "regular" Economy is priced vs. the market.

I fly multiple routes already where the legacy-carrier "Basic" matches the Southwest fare. In that case, the WN fare remains a far better value. I've seen the legacy "regular" fare double this amount.

If this is cover to just move more and more traffic to Basic economy fares - make that the new standard leisure fare and make "regular" economy the typical business-traveler fare - then this isn't all that valuable to me. A free SDC on business trips would be nice, but it's kind of moot with so few frequencies these days.