Wasn't that Monsters of the Multiverse? They've had years to hear the feedback from that and see how those changes to the math and formatting worked out.monsters
specifically "boss" monsters
Please not. More base functionalities/options.Feats, feats and more feats.
agree, but more things should be feats and not fixed class features. and more feat slots for characters.Please not. More base functionalities/options.
Some things should not be feats or have ever have been feats. Feats should aways do something big. Not change little numbers or add things that should be base functionalities of skills or ability scores.
I am not sure about that. But I could see adding a few feat slots at fixed character levels (1, 6, 10, 14 come to mind). Would help multiclassed characters and would help supporting your subclass abilities.agree, but more things should be feats and not fixed class features. and more feat slots for characters.
maybe subclass abilities are good candidates to become feats and PCs getting feat slots at those levels; some prerequirements may apply.I am not sure about that. But I could see adding a few feat slots at fixed character levels (1, 6, 10, 14 come to mind). Would help milticlassed characters and would help supporting your subclass abilities.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.