similar to logblock's /lb redo sel and /lb rollback sel which rollsback or redoes within a selected area.
simply put adding a /redo <player> [time] z (for cuboid's shortcut) and /undo <player> [time] z

running into situations where somebody helped build, then dun goofed resulting in their ban and their contribution to the build is undone leaving it filled with holes.

projected solution: leaving the dun goofed shenanigans and restoring their goodliness.

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Unfortunately, without consuming more file space, and such, each undo action is placed into a buffer. This buffer can be called with the /redo command, but the buffer only lasts once per user. If you /undo more, it overwrites that buffer and in turn, the actions last made.

I will look for a solution with Redo, because it's quite poor at the moment. I don't think the buffer stores itself properly, and it doesn't fully redo actions. This flaw was inherited with MCLawl.