How long would be appropriate to wait?
Challenge attendance has declined this week and barely hit 7 rounds (66), which is a rarity for the Saturday challenge. Last week, we had over 81. Preliminaries are apparently not firing as much as they used to. Win-trading has picked up again and typically thrives when league queue time is low (win-traders need an empty queue to math into their accounts). I try not read too much into fluctuations in tournament attendance, but the pattern is concerning.
As for adapting, Lurrus was played in 50/66 (76%) of decks this week. The adaption is typically playing Lurrus. While some players are trying different things, the shear monotony of the format makes the experience unbelievably repetitive.