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1st question: Not really. This is a 2d engine, not a 3d engine. I've seen one plug-in which converted it to something like the old Wizardry games (1 - 7), but that's it.
2nd question: Yes, but right now there are no finished plug-ins for this. Writing a new battle system is the hardest thing you can do in MV. To give you an idea, ACE has been out for years now, and has only a couple action battle systems that I know of.