I think the only real issue I have with TT at the moment is that you're expected to do a lot of card grinding to get to a point where half the cards you've been grinding can even be added to your deck (due to the hilariously tight early hand restrictions). And the path to do so is, at least right now, not exactly very clear - a lot of TT opponents are straight up unbeatable at low levels without certain regional rules being around to balance the field.