The Sacrificial Slabs are essentially a backup to be used if a player only has one life left. It’s not necessarily easier and nothing bad comes because they are used.

Anyone can travel through the dreambubbles but only the living, like Aradia can leave. She stays because she wants to.

The Beat Mesa is a container of large amounts of temporal energy. John scratched it to release the energy so Skaia would have enough juice to change the course of the ectobaby’s meteors and rewrite history. Thus is the process of the Scratch.

Yes, Granpa brought it back to Earth with him, stuffed it as is family tradition and put it in the attic where it stayed until Jade found it.

He flew off leaving Vriska to slowly bleed out.

Probably not since the next few upd8s will be focused on Caliborn and his masterpieces.

Yes, some of them can be seen in the Openbound flashes.

They are located in the center of Derse and Prospit‘s moons.  Except for Aradia’s which was in the center of Derse itself, but that was a rare exception.

I’ve considered it, but there isn’t really anyone I trust enough to give the password of this blog to.