Exactly, everyone also has different opinions on how to even bring back 2h.
I dont think anyone has said it wasnt viable, I know I didnt because I even used it in Cata and WoD unless I could get 2 1h weapons.
Viable is really community driven and it depends on the content you are doing. Mythic progress? They want you to go the best possible build. Running heroic dungeons? Mythic 0 dungeons? Who cares what run those you are probably going to complete it if you dont sit on your hands.