Specifically considered for the use of a multiplayer Survival server.

Suggestion, the option for Waystones to prevent players from potentially resetting/destroying other player's Waystones.

If necessary, optional suggestions can be to prevent Waystones from the same player from being too close to each other and/or a limit to how many one can have - so as not to build the equivalent of a 'bedrock blockade' or anything. Not likely to occur, but it's good to cover bases I imagine.

And of course, allowing OP to still have full access to Waystones.

Due to the potential of abuse or other issues related to player-placed unbreakable blocks, I think this is better off being handled by a seperate permissions mod (like those that allow claiming of chunks).