But, it could still use a few feature additions, additing powerful new capabilities and fixing pervasive issues with its design. For example:
There are no area commands available that both allow full interaction of objects, while at the same time preventing all block placement and breakage in the open area. This non-uniformity breaks the functionality of many shared workshops.
Area boundaries should act as barriers to flowing liquids, damaging spread, or deadly radiant sources from realism mods. One obvious example is - if the owner of a lava grief does not have privileges in your area, then there is no reason the lava should have flown down into your protected area. Once unauthorized liquids reach the edge of the area, they should stop updating to prevent you getting entombed in your otherwise peaceful home. This mechanic also can prevent liquids and sources from escaping outside of personal areas, enabling players to freely place moats and farms and whatever they want inside their own base, since many servers have disallowed bucket usage.
Medium network latency allows client players to abuse and take advantage of block rollback lag, where the client has no idea it wasn't supposed to be able to break through someone's wall before the server snaps them back into place. Running a validation check on the client before ever allowing the action would prevent nearly all wall-phasing and base-stalking on all servers. Along with the boundaries enhancements, this would be a major step forward for the whole community.
Finally, and honestly, since both this mod and the protection mods are used ubiquitously, contributors should consider remastered versions of both be implemented into the base game engine, where it doesn't have to rely on slower LuaJIT addon subsystems for such a critical component of the gameplay and overall player experience.
If a user could choose to allow usage, but only with certain item groups, like 1 block tall farming crops, or even bamboo & papyrus, or certain trees, or all of them, but not allowing things like cobble and other objects that do not fit the group specified.