I feel like making underjolt genocide runs be able to change like

Dustjolt.

Joltbelief.

A 4th phase for jolt!Sans.

Jolt!sans being tired of your bs and attacks you as you start the game.

DanDan (Gaster) fight

The fun value thing

And possibly more.

If I say that im gonna add a feature, I MEAN it, since no one will stop me, right?