doctorbadwolf
Heretic of The Seventh Circle
I’d love to have that be how a class works, but I think it’s a lot more complex for all Spellcasting to work that way.If it's about being able to do something with your lower level slots, why not just allow 2 slots at a given level to be used as 1 slot at the level above? So if you had 2x 1st level slots, you could use them to cast a 2nd level spell (that you have prepared). And if you have 2x 1st level slots, 1x 2nd level slot and 1x 3rd level slot, you could use them all to cast a single 4th level spell (that you have prepared)...
Sorcerers, or Warlocks. The ones that break the rules of how magic works. Maybe Artificer, but IMO artificer needs a higher spell progression more than it needs even more versatility.