It comes up with the Kents because they actually were dead for 50 or so years, and that shaped how Clark functioned as an adult. It's not like it's a...
I wouldn't advocate for killing May off, especially when they can let her in on the secret again and she's not as old as she was originally depicted....
Are you not familiar with Waid? He's a big name writer who LOVES Superman, but also the DC universe as a whole, which also obviously includes Batman....
Tbf, that's been the DC universe status since COIE. It's gotten exponentially worse since because they keep picking at the scab, but that's the root...