Ah well that makes sense, i read the topic line "DPS Legendary gem no longer procs for tanks" as a statement, no question/bug report. Then sadly i'm with Nillo on this, 5% more damage are 5% more damage. IF they'd change the procc to an use use effect with a reasonable cooldown this would be a total different situation.
We're out of paladins for this tier as well, hand of protection allowed for a lot of cheese so it's really annoying not having it. We played with a holy paladin last tier though, 4 set pvp bonus + blanketing the raid was quite strong ('overpowered'). I think disc+anything works quite well this tier, with disc+mist/fistweaver probably being the strongest combination due to the shear amount of extra-damage & multitarget fights. Really looking forward to the resto druid next tier