The idea of D&D being "four, four, four games in one!" is cool (even if I have no desire to play two of them) but is at least somewhat at odds with the standard "20 level campaign-arc" model -- the idea that you're not supposed to just pick the one game you like and stick with it, but are instead expected to play all four, in order. This is likely to be just as unsatisfying for the guy who wants to play wuxia-style but has to wait around for 6 months to a year playing "grim n' gritty" before he can start having fun as it is for me, the guy who was enjoying the grim n' gritty game but now find myself stuck playing wuxia-style as my ostensible "reward." The game should, IMO, include more advice (and/or alternate rules) to facilitate narrower one, two, or three-style campaign-arcs for those who prefer them.