I've been reading back through againg on this post, and some of the things you say and the way you have put them Macca are quite confusing. It seems to me having read them again that you think that mixing is just keeping the beats in line. It isn't, there is far more to it. Structure and placement matter, as does EQ'ing - and it takes a lot of skill to mix fast and makes it sound good.

M Zone does structure very well, he places the next tune perfectly most times and he always mixes fast, playing the best part of the tune (as you yourself say in an earlier post) before banging in the next one. This is all part of mixing, so it baffles me how you say M Zone's mixing is bad!?

Do you DJ yourself? If so, I go back to what I said earlier - try to mix a set like how M Zone mixes, then see what you think of his mixing.