Let me preface this by saying that I play Unholy / DW Frost. I enjoyed the 2H playstyle until about halfway through MoP when I finally realized DW Frost > 2H Frost.
What I don't understand is how 2H is SO terrible. It seems to me that 2H was Blizzard's intended subspec for Frost. Hence when you eat a savage feast, you are given Haste instead of Mastery. Also the reason the class trinket synergizes with Obliterate and is by far BiS for 2H Frost.
My guild is working on Mythic Archy and I recently obtained a MWF 746 Maul of Tyranny so I thought to myself, "I've got all this mythic haste/multi gear laying around and a HWF socketed class trinket. Maybe 2H Frost isn't as terrible as people think because it's under-represented in parses". So I put all my haste gear on with my gnarly 746 blade and tried it out at the beginning of the night on Archy progression.
It was absolutely horrid. The spec is *supposed* to be single target burst. I was easily last on damage, even on attempts where we wiped before all the adds came out. I would have really fallen behind at that point lol.
How can it be this bad? I thought the addition of multistrike helped alleviate the "bad stats/scaling" issues?
One thing I've noticed that I believe sets Unholy apart from Frost, is the 100 talents syngergize with Unholy a LOT better. The trinkets, too, even.
I'm excited that the subspecs are being done away with in Legion and look forward to the new and hopefully improved design for Frost, but the next 4 months sure are going to be miserable being forced to play Unholy. If I have to play another week of dot management, pet management, or BoS setup, I'm going to cut myself. Long tier is long.