I don't know that many WDW resorts blow Uni out of the water, but I think people try to make apples to apples comparisons to an apples and pears argument. Both are stone fruits, and make for decent to very good desserts, but they're still different.
The Uni "deluxes" are themed, enjoyable hotels that are within walking distance to the parks and come with remarkable perks and very good onsite dining. When fully operational, they also offer live entertainment or dining shows. Very similar to WDW on the same deluxe level. They lack heavy theming (anyone who berates Riviera but praises Portofino needs their screws tightened), but aren't outright owned by Universal, so there is some give and take between Loews and UOR going on, I'm sure. Oh, and no fireworks views at Uni since they don't really do pyro. But that's not really our cup of tea, anyway.
As for the value end, I'd much rather stay at Endless Summer (either one) or Cabana Bay over the All Stars, but maybe not Pop or AoA. The biggest drawback to Endless Summer seems to be the lack of soundproofing, and that's too bad. Our family, with two teenage boys and a mom, definitely see the appeal of their 1 bedroom/3 queen suites, just for the sleeping surfaces alone. All three Universal values are well themed and tell a cohesive story, without being "over the top" or "in your face." That appeals to us more than a 2.5 story football helmet. We recently stayed at AoA for the first time, in a Nemo suite, and I really wish there were more non-DVC rooms like that on either property. Two showers, 2 TV's, 3 beds (even if they're foldaway), and a door for mom & dad so they can close the door and let the boys hang on their Switch at night? If they weren't so grossly overpriced, that would have become our preferred room type for the time we have left with them.
It's the moderates where WDW blows Uni out of the water, IMO. And I'd grant you that the new Gran Destino rivals or beats the Uni premier hotels on dining and theme. Any of the moderates at WDW, even CBR now with Skyliner, is better than what Universal pulls off in that tier. Aventura is "Vegas lite," IMO, and I'd rather just stay on the strip if I'm in a hotel like that. Sapphire Falls suffers from being priced like a premier without the Express Pass inclusion, so we've never seriously considered a stay there. The rooms look very nice, but so do some of the I-Drive major brand hotels.