I think a lot a nice quality of life fixes went in with these newest bonuses...but for the love of god please do something about the dps dk double proc bonus. It IS a dps boost, of course, the problem is that it's a quality of life nightmare. DKs aren't completely gcd locked like the days of wrath, but the times when we ARE gcd locked is...when we proc. doubling up on the procs is just going to make this feel crappy, you WILL be wasting either procs or other attacks, despite being a gain that's just no fun at all.
The 4p is just not that strong, when you consider the proc chance and how RP tends to be spent (for both specs it's often dumped all at once, so your procs will just overwrite each other anyway, then you go without for a long time). I like that they're inventive set bonuses, but they just aren't going to be very fun in practice.
Basically this. An easy fix for the 2 piece is to simply make it a chance to double the damage of your next Howling Blast/DC, and let that single DC stack up 2x towards Dark Transformation. This removes the double GCD usage and confers a similar bonus.
The other thing that concerns me is that we are getting two
set bonuses that only serve to increase our already noticeable variance (Rime procs, KM procs, Runic Empowerment procs). Looking at every other DPS class and their set bonuses shows only a handful of random proc bonuses (Hunter 4 piece, Mage 2 piece, Enhance 4 piece, Warrior 4 piece). Hell, Spriests get a bonus that reduces
the random aspects of their spec (Shadow Orbs).
DKs are the only class that have two extremely variable bonuses. Literally procs off of procs. Please don't go down that road.