I do think there have been a few too many musicals of late where the set design didn't feel like minimalism was a design choice so much as a budget concern. We see this a lot with revivals that start at Encores. The current Ragtime is stunning, but to me that is true in spite of its design which doesn't add much to the show. The Into the Woods and Once Upon a Mattress revivals similarly felt underbaked in terms of set design.
For me, this season's most disappointing designs have to be Chess and Two Strangers. In my opinion, Chess feels like an Encores production from top to bottom minus maybe the neon sign and the bed that raises through the floor. And Two Strangers, for me, feels like a designer's first idea. "It opens in an airport, so...luggage?" I am CERTAIN more thought went into it. And plenty about how that set unfolds and reconfigures is clever. That said, I really didn't enjoy looking at it.
But as others have mentioned, while minimalism is a touch more dominant than in other eras, we're certainly still seeing shows with eye-popping sets. Look no further than Stranger Things. Or, as mentioned, Maybe Happy Ending. Or let yourself remember that sometimes minimalism can be incredibly beautiful and deeply warranted. I feel like the designers who have been working with Jamie Lloyd and (less recently) Ivo van Hove consistently find incredible beauty even with relatively stark design.
All of this said, I would absolutely kill to see another set as impressively OTT as John Napier's original Sunset Boulevard! :)