Frankly: The Dao are slated to be imported. However, we have no plans to extensively modify them; They pretty much already use the Japanese system, so it will be kept to that (had forgotten they had void already). They will work much as they do in Orbis.
They actually don't really have Void in the last version I played, but there was a long talk about it on the Orbis forums that they should. I don't know if dimensional is the best fit for a Void element (I think Mind still fits the best), but I think it could work with a bit of playing: there is a lot of lore available. I would avoid Metamagic, though.
...I admit that I was wrong: the word Dao is, indeed, a Chinese concept. However, I think some people need to go back to their Japanese mythology. The biggest individual deals about the civilization are the priests as the magic casters (no pure arcane line) and the elementals who voluntarily join the civilization, in my humble opinion. Both of those, but particularly the first, are very Japanese concepts. If you go back through Japanese mythology, you will find few 'mages' (when spells are cast, it's done by descendants of the gods, the kami, and priest/ess's (...and not anywhere near as many miko's as anime would have you think)- the most magicy things get is a Buddhist Monk, which often are Chinese tales that have been absorbed as new Japanese tales): this is unlike Indian or Chinese mythology, where you could fill pages after pages of names of mystics.
That leads to the second point: the elementals and Dao living together in voluntary harmony seems like a Shinto concept more then anything. There's no binding involved, which seems to always happen in the Chinese tales when elementals are needed.
Also. China is not 'Asia' anymore then Russia is Europe or the United States of America. The repeated use of 'Eastern/Asian' Elements to speak of Chinese (and Korean) elements seems rather silly at this point. The spoken of elements are Chinese: Wood, Fire, Earth, Metal, Water. India uses Void, Water, Earth, Fire, Air. Japan uses Earth, Fire, Wind, Water, Void. Tibet tends to use Water, Earth, Fire, Air, Space, as does Buddhism. (The Void/Space/Aether/Heaven/Sky each philosophy uses often have a lot in common, but tend to be seen as different all the same to each philosophy, just like Air and Wind aren't always the same thing).