Unfortunately, it looks like the legacies are also moving in this direction. UA is installing new slimline seats on their A319s and A320s (and adding 1-2 rows in the process) which sound worse than WN's Evolve-- word is the pitch will be only 30". And while it hasn't gotten much attention, AA is using those same seats (as UA) on their new A319s and A321s, and I would not be surprised if those birds had worse pitch than what's currently found on AA mainline.
Ouch...I think I'll just quit flying.