I've recently had a thought. They might've finally strip mined Magic's potential to its limits over 30+ years. There are no new cards to make, because everything has been done. That's why we get weird twists on mechanics that were perfectly fine, just to present it as new. Sneak in place of ninjutsu, harmonize instead of flashback, cloak instead of morph etc. Okay, some might have power creep or rule engine reasons, fine.
I think Mark Rosewater said somewhere, that it's fun to find the way to represent existing characters in Magic rules. And I indeed have a nice surprise sometimes, when I see a familiar character with Magic mechanics and think "of course, that makes sense". At this point Magic engine should support pretty much anything you could think of. Problem is, I recognize maybe 5% of UB characters, and find 100 variations of Spiderman boring as hell. Most "legendary" chars are just stat beatsticks to fill the quota you'd forget in a day.
What I'm trying to say, is that adapting existing media is a new challenge to them, very different to the usual "what new could we even do in Magic at this point". It kinda has potential to prolong strip mining of magic. I've also seen a theory, that mainstream hypermarkets would have a ready nostalgia IP product in a form of tried and true Magic: the Gathering game. Instead of some movie promo tie in game that will be forgotten in a year.
I play cube exclusively, so I'm not bothered that much, but also unexcited about constructed formats. I'm still anti-UB, but now I realize it could be vital to the longevity of the game in the current release schedule. Of course, you should blame Hasbro executives for the stupid release schedule. Shame that actually interesting designs are from the fabled plane of New York now. I'll have to make custom in-universe proxies If I'd want to play with them, but I'm not opposed to UB existing now. Just would be a lot cooler if it didn't.
At this point I doubt it's possible to make a truly breakthrough Magic set within the boundaries of the game as it is. But do we really want triple-sided cards, initiative 2.0, physical side-decks or permanent stat upgrades with each passing match? I think most people here want simple yet exciting non-parasitic glue cards for various themes, but I sometimes think everything has been done at this point. Maybe a couple actually neat new designs per set.