Maybe something to add to the "About" section of https://www.snbforums.com/threads/asuswrt-merlin-custom-firmware-for-asus-routers.7846/ or perhaps the README or CHANGES files in the zipfiles?
Too much work to keep that up-to-date, since it constantly changes. And as you said yourself, most people don't read anything, as witnessed by people asking the same questions over and over again even tho they have been answered many times on these forums. Take the Adaptive QoS errors that gets logged, a simple forum search on the exact error message would provide the answer.