Giltonio_Santos
Hero
"The Elemental Planes were unusable"
Yes. Sure. But they used to be sources of primal energy, the place where elementals come. Should every plane be a dungeon to explore? Sorry, this is a very poor idea.
"Infinite planes stagger the imagination"
It seems your imagination is kinda short. Infinite or not infinite, what difference does it make? If you walk from A to B does it matters if the plane is infinite or not? Infinite means less maps, enforcing creative ways to travelling... finite is like "let's map the place, explore, kill the boss and take the loot".
"Good planes were boring"
Probably, but they were there for a reason: background. Again you want every place to be a dungeon?
This. Exactly.
