Well, how it is now is that primary and secondary are separate. And on the current gear, you can only get X number of primary slots and the others are then secondary. So, You can't roll a trifecta with average damage, main stat, and AR or vit. Those are all considered primary. You have to get at least one secondary (and possibly more).
And, with the mystic, I've been told you can can only change stats in their primary or secondary status. Like, you can't reroll a secondary and get a primary. So, the majority of those "almost perfect, but has gold find" gear will never roll anything other than a secondary stat.
The itemization looks as if they are going to start focusing on forcing you to decide between the go to stats now. So will end up with a combination of crit, crit damage, and AS, but only two of each. With that said, crit damage looks like it can be phased down, as now the +elemental and +skill damage end up being great. Plus, with the new AR gem, you can easily take that over an AR roll.