I can only say that you need to try the quad. It's not like the twin fin boards, but much more all round and "normal" in general sailing but then with all that extra "flair" when wave riding. The quad setup seems to handle a much bigger range of sails also which actually make fin tuning easier. In fact, I can not think of an EVO sailor that would not feel the corresponding Quad is an improvement right across the board, regardless of sailor competence.
And even if you think four fins will add some complexity in some sense the end result as I see it is a much more all round board than the EVO ever was.