Quote Originally Posted by Trask View Post
- A way for spells and monsters that use the Astral and Ethereal planes to work
I never really understood why the astral would need replacing if removed. Unless a LOT has changed in 5e. Outside of the spell Astral Projection and adventures actually taking place on the astral plane specifically, the astral plane exists purely for flavor purposes. It's an unnecessary epicycle; an answer to a question nobody asked. The summon monster spells, for example, make exactly as much sense without it as they do with it.