I didn't read the whole discussion.
So maybe I duplicate others opinions.
I don't completely like the new spellcasting block. I think it needs another overhaul. I think recharge mechanisms should be used a bit more.
Contra new format:
- I agree that a lich should be able to prepare any spell that a mage can prepare.
- having abilities that are non spells that exactly duplicate spells but can't be countered or resisted leaves a bad taste.
Pro new format:
- A big problem with enemy spellcasters always was that you never met them after they have cast some spells, so they were always way more challenging as an equal leveled PC during a typical encounter.
- PCs also have spell like abilities or modifiers to spells that make them uncounterable or unresistable. So it is not totally out of order that NPCs have access to such abilities.
I wish that PC and NPC spellcasters have some kind of recharge mechanism that disallows using the same spell over and over again, even if it is as simple as lair actions are right now.
PCs might be allowed to prepare the same spell twice to be able to use them twice in a row or so.
In one of the first DnDnext playtests, there actually was a rule that a spellcaster had to alternate between cantrips and leveled spells. I think that this is a bit too predictable, but I really think the game would benefit from such a rule.