I don’t think you are wrong on this at all. I think the biggest misstep on your post though is the fact that this park has been operating for quite some time now with essentially only 6-7 rides and sometimes even less than that depending on construction at the park.
Nintendo and Slop will put this number closer to 10 and whatever attraction comes next (whether it’s a Mummy replacement or a spot we aren’t considering) will only further solidify this park as a full day experience. This is why I called it a sleeping giant.
Based on what is fact: Universal Studios Hollywood is home to the best show in company (Water World), two of the most highly themed lands in the industry (Potter and Nintendo) it will have a revamped JW after next refurb, the studio tour, a slow style omnimover at PETS and that right there is already impressive for diversity and strength of park.
Further Potential: Whatever becomes of mummy (Something is happening) Me...I hope it’s Hollywood’s next unique, technologically advanced, indoor thrill ride. That’s what I would like to see it changed to. Outside of that, I have also heard murmurings of a potential change to a certain minion attraction. Not a closure... a change... Take these with a grain of salt, you know how things change as well as I do, just consider all of these facts and put together what this new park can potentially be in your head. This is the reason people will come back. There will be a LOT to do in due time.