1) It is not auto attack cancelling, it is simply auto attack being the priority in most situations where it should not be (and it is not in other games, clearly, otherwise many of us would not be so freaked out by it)
2) My "complaint"* is that I am looking at my gear and all I see is that beside a few basic traits, the most variety is simply "resistance". (Same with non-unique gems btw) That is not variety. This is not D2 where I suddenly decide to farm Andariel only and I need poison res. The game does not throw me one elemental type, and also, if it did, there is no dungeon reset either, so I could not build a gear with that specific res and farm it over and over again. You cant really have elemental resist variety this way - and while All res certainly dumbs it down one step further, at least it does not get introduced until mid-hell, really.
*It is not even a complaint: I am fine with the gear in D3, and fine with it in T2 as well. So far.