This set was not useless by far, it's actually a very under-appreciated set IMO on live right now. Though I will say the one piece bonus getting nearly cut in half will hurt it, so at most I'd add a little more to the two-piece, just not what OP chose.
Don't like the mass taunt option and I don't see them adding a tanky crit resist buff for pvp use with all the tank set slaughter they just unleashed.
Something minimal like a 5% block cost reduction or small health regen bonus, etc. Even where it will be after Greymoor, it will still serve the same niche use it does now: a set that saves bar space and resources (from not having to cast your own buff) while also giving some extra mit and health. It will just be a bit harder to justify based on the loss of the extra mit now.