Feature:

Move Dimensional Tears and all related features to a separate mod, it doesn't fit at all & it's super annoying, especially as a pack maker, you have no reason to expect a mod with seemingly solely cave related features to have something so random & unbalanced.

Alternatives:

Alternatively, make it possible to disable entirely, through the config.

Additional info:

generally*

• Infinitely renewable thanks to piglins
• Allows near-instant fast travel to any point thanks to respawn anchors
• Nullifies any other form of transport by being readily available

This might be one of the most unbalanced "side features" to a mod I've ever seen.
Splitting it into a separate mod would certainly be one way to solve the problem, but I do think it would be fine to have some form of item that can be found while spelunking that allows players to return home instead of needing to dig all the way back up.

Perhaps these items should not be craftable, but instead found in underground structures?

A better item to simply "get up" would be some sort of digging/mobility throwable, such as a drill that digs up and places ladders, a sticky bomb which could be used to bounce up sheer faces, or a pickaxe-grappling hook tool.
Dimensional Tears have more utility outside of spelunking than within it, and break the balance of the vanilla game with its iron-tier obtainment requirements.

Dimensional Tears also encourage players to mine farther from their base, rather than using minecarts, which they would have access to at that point, to create a train to transport their resources to and from wherever they are to be processed/stored.