The Un-Sets, imo, are really something that ought to be kept around as they offer freedom, creativity and forward/very forward thinking
Rooms were designed in such a way that you can use either half without wasting the other, so feel free to run out the Sauna on turn 5 and snipe something down with the Furnace later, or vice versa
Im almost certain itll become a common play pattern to Flash this in on your opponents end phase and then start building up your little flying army
They often synergize with strategies that focus on control, card draw, and tempo, as many Birds have abilities that support these themes, such as tapping down opponents' creatures, drawing extra cards, or providing battlefield-wide buffs
What did surprise me though is how nice the Graveyard subtheme ended up being: I count 20 cards that interact with the graveyard directly with a very generous definition, including anything that recurs (Starfield of Nyx), puts itself in the graveyard (Binding the Old Gods), puts other enchantments in the graveyard (Nyxborn Behemoth), or triggers off enchantments going into graveyards (Narci, Fable Singer)
