If there are limits, because of the official mod.io pipeline, moderation and cross-play support, fine. But it should be easy to deactivate them.
It sounded like there are legal issues (Hasbro controls the setting), so Larian may not be allowed to provide a full level-and-story editor that could be used to create whole new campaigns. Or a GM mode, so bg3 would become a virtual tabletop system.
But validation of levels is already a huge step. It would simplify tool development a lot.
