Yeah but it is the very first deck since i've first play duel links (including sylvan, fck i regret playing sylvan) that manage to get 11 straight winstreak in LEGEND.
Most top decks/players already hit KoG this season so I think it is too soon to call it "broken" yet. I'm eager to see how it fares beginning next season. But I bet it will be at least Tier 1.5.
I have more tolerance towards Fur Hire than Sylvans, I don't like how sacky Sylvans turned out to be in DL. I love them in TCG, but DL brought out the worst in them.