If the minions don't keep the buffs, she can still be good. But if they do, she'll be broken.
A designer confirmed that this is the case.
That means you can rebuff Amalgadon or Battlemaster each turn, which makes her slightly better than I initially thought. You can also get easy triples if you start with a token-producer on turn 1.
Still I think she will be too inconsistent in this fast meta.
Not strictly true. You can bet on yourself if it is only you and one other player left (or against yourself, which is likely the only correct move at that point if you lose and manage to not die)