While I agree with everything else you said, I don't agree that a room at Universal is more expensive than WDW.
Oh, I never said it was more expensive. Simply that it's very expensive.
RPR @ Universal is nice, but its cheapest rooms are not Deluxe. They are equivalent to WDW's moderates - in fact I think FQ+POR's rooms look nicer. (The cheapest non-AP rate I could find at Universal's RPR is $200 a night - again, comparable to Disney's moderates, and close to twice as much as a WDW Value resort).
Let me preface the following by saying that I like Universal and I'm going to be visiting (off site) for 2 days after my 2 weeks at WDW. I'm by no means a Universal "basher":
As great as some of Universal's attractions are, the overall experience isn't the same. I find a much greater diversity of architecture, detail, and variety at WDW. Wizarding World looks fantastic - and I'm excited to see it in person for the first time in October... but it seems rather small and would probably be far more emotional for a Potter fan, which I can't claim to be. Outside of some of the e-tickets, however, there's very little about Universal and IOA for me to gush over. They have some awesome rides - and I'm incredibly excited to ride some of them for the first time, like Transformers and Forbidden Journey, but the rides themselves are mostly the extent of what I'm excited about. At WDW, I could go on for days about non-ride things that I'm looking forward to seeing, smelling, and doing. Food, lighting, architecture, music, animals... that's just scratching the surface of what I would personally pay
more for at WDW than at Universal, but will actually pay
less per day at WDW than if staying on site at Universal.
I'm not really trying to put down Universal, but WDW feels far more like its own world, while Universal and IOA have always felt like a couple of theme parks - great theme parks, for sure, but they just don't take me to another time and place in the same way WDW does.
And even with the attractions, Universal often doesn't go the extra mile. Just as an example, it's things like Dueling Dragons and Hulk which are Six Flags type attractions that do nothing to set themselves apart. Rock'n'Roller Coaster and Expedition Everest are inferior
roller coasters, but both have far better theming and immersion, and the experience of those attractions is more memorable. Splash Mountain has a superior look, feel and theme to Dudley Do-right. I step off Dudley smiling... I step off Splash Mountain feeling giddy. Transformers, Despicable Me, the Mummy, Terminator 3D, Shrek, Twister... they're all housed in a nondescript box, for the most part. American Adventure is moving; Carousel of Progress is charming and classic. Living Seas, Animal Kingdom, World Showcase, Frontierland, Tomorrowland, Liberty Square... there are
so many things at WDW that transport me and impact me in a way that Universal struggles to.
I'm sure others see it differently, which is perfectly fine. But the bottom line for me is that I'm passionate about WDW, whereas, as much as I have enjoyed Universal and IOA (and I'm sure I will again), they've never moved me emotionally. That's what sets Disney apart in my heart, and why it makes it a far better value.
I just realized I thread-jacked like crazy. I'm so sorry OP. Let's tie it in: WDW is the best. You're going to have a great time, and staying off site isn't a big disadvantage for your trip!