To me it looks like it will be the first tier for TG fury to reach the "BT crit hardcap". Quickly looking with my bad math, those crit trinkets alone in combat will grant you around +15% extra crit easily compared to the current tier. So adding up higher Item level giving us more crit rating, getting all item pieces with most crit rating and gemming crit everywhere and getting double of those 2h axes should leave us being close to 50% in combat, making BT basically crit 100% on 90 lvl target.
That in turn could make the 2 set and 4 set bonuses "less desireable", meaning not bad at all, but not that much needed either. 2pc set would still give you additional raging blows, so nobody would skip that, if you get the crit tier pieces. I mean you could already get that 50% in combat with the 522 normal gear if i'm not too far off.
I'm not rocking on heroic gear atm and my buffed crit with 499 ilvl is already ~31.15%, So even with those trinkets alone I wouldn't be that far off. If you can add those prismatic sockets to the new weapons meaning more additional crit with 2 sockets for each weapon, that will also help a lot to reach that goal!