I've been getting a lot of comments from people thinking that this is a Storyshift take. Or questioning why characters have the wrong role, etc.

The closest it will get to Storyshift is in the Past Timeline Arc and the first area. After that things will be COMPLETELY different.

Roles, Areas, Story,

New bonus areas, Side Story’s, etc.

Things are not the same!

An example being that Undyne is the area boss for Violet Grove (aka the second area in the game) instead of Asriel.