Pretty sure there will be no console port. Having seperate populations, much smaller than PC, split up between PvE, PvP, RPPvE, and RPPvP is asking for a disaster.
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D1 was on consoles. It makes more sense the 6 button configuration was for a simple LMB, RMB, 1, 2, 3, 4 hand layout. Could also be the average amount of skills used in D2. All makes more sense than it was just fine to put on consoles, when FF11 already existed and many console games had more than 6 inputs at the time.