After 1 week. My thoughts on dual to quad DK pvp

[Mercbeast]

So why do pve DKs use 2hers?

It is a different dynamic. Sort of a fundamental concept of multiboxing. What works best for a single account often isn't best for the multiboxing setup. So...

I imagine 2h generates more threat.

This is a moot point when you run 4 blood DK's. You are 1, not trying to hold agro over DPS. 2, you are generating more self healing through more worm procs.