They're using mog as a platform because they are literally that desperate to find anything to dispute this as a possibility. They're reaching for any frail thing they can. Miserably, I might add. They've already been debased to insults, which is quite amusing in itself.
I'm with you on the classic Ashbringer skin, but it is iconic. I think it would look odd on a Troll, if I'm being honest. Thankfully you can switch it to anything. Jin'rokh would look good with the new Unsullied gear. Might play with that later to see what it looks like.