Same here and even the new lock screen is not something I really like. I installed the beta on my old XS Max and I found it more complicated to set new wallpapers (complicated in a way of needing more steps) for no real reasons. Plus, adjusting new wallpapers is a pain on iOS 16 because you can't adjust the image with one finger, it have to be with 2 fingers so its harder to make micro-adjustments.I will also stay on the upcoming iOS 15.7 at least until 16.1, or maybe even further versions like .2; .3 or even .4
simply because I hear a lot of people complying about battery life and to be honest I don't see any huge changes except lockscreen that make me want to update to the next version of iOS.
And like you said, other than that, there's nothing really different or new that make me wand/need the new major version. iOS 15 works flawlessly on my 13 Pro Max with awesome battery life so I'll definitively stay on iOS 15 as long as I can if Apple allow me to still update my phone to future iOS 15 releases.