As long as it follows Suzuki’s vision, then I will accept it no matter what. However just because I would accept it does not mean I would like it. Shenmue has its own identity distinct from Ryu Ga Gotoku and making its combat a carbon copy of Ryu Ga Gotoku does not sit right with me. To me, it would give the “Shenmue is the inferior Ryu Ga Gotoku” critics ammunition since Shenmue would be admitting that its combat system cannot compete with its spiritual successor.
In my opinion, if SEGA with all their resources get involved with a potential Shenmue IV, why not give the fans the combat system they fell in love with? All Suzuki would have to do is adapt the combat of Final Showdown for future Shenmue games. Shenmue III’s combat system has divided the fan base, so why not bring back the system that most fans would enjoy? However (and I blame this on the budget) if Suzuki wants to use Shenmue III’s combat system in the future, why not find a way flesh it out even further?
In the end, Yu Suzuki is a rare breed of designer who is always looking beyond the horizon. Hampering him with conventional game systems would do Shenmue a disservice. After all, one of the reasons why I respect him so much is that he did not comprise his artistic vision after all these years when he had the chance to.