It's mostly defined mechanically by the one set that took place there, which meant going back to themes like instants and sorceries and pushing blue, as the flavor of education is core to the identity of Arcavios
Its also worth noting that in Hazduhrs surprisingly comprehensive lore, its stated above almost everything else that hes old, ill, and will probably be dead in a couple years
The broken cards from Eldraine and Ikoria are leaving Standard, giving us a fresh slate to build on, which means it finally might be time to kick an opponent or two with cards like Roost of Drakes, Verazol, the Split Current, and more
Seriously, the game made me hate the character this much, and I kinda liked her before this), so it wasn't much of an issue
I remember hearing about a deck that Charlie Catino (our current Director of New Business in R&D) played where he kept using Timetwisters to keep shuffling graveyards back into libraries