They would have done a lot differently had they had a clue of how successful WDW would be. Nobody knew. Well, except me. But nobody asked my opinion.
Successful as in attendance? Successful in that this Hub refurb is somehow a necessary evil?
They knew exactly what to expect and planned on it accordingly. They had the model to base things off of in Disneyland. They expanded walkways to allow for more foot traffic. For somewhere between 25 and 30 years, WDW did a great job of keeping SUPPLY up with DEMAND and the resort flourished. Then something happened.
WDW stopped keeping up with demand by cutting off supply
If you've ever visited Disneyland, you would realize how compact and cramped the park can be; but, somehow they manage to run fireworks, parades, and Fantasmic. It can cause traffic jams; but, the park can handle the load without carving off real estate for FastPass viewing.
Why on earth does WDW feel the need to do so? Does the difference of 2 million guests per year fundamentally change the ability to view fireworks and parades? I would argue not as Anaheim is actually going to throw a nighttime parade back into the mix next year and my guess is that it will run more than once a night during the summer.
No, I don't think the Hub refurb in Orlando has anything to do with guest satisfaction in terms of providing easy fireworks viewing or improved traffic flow. Those are side benefits to the project. They weren't the reason why the project received funding.
The Hub refurb in Orlando is simply TDO's method of dealing with the SUPPLY/DEMAND dilemma. The difference between the Magic Kingdom and Disneyland is that Disneyland has significantly more capacity in rides and attractions than the MK. It's rides and attractions that pull guests off the streets. It's rides and attractions that give guests something to do. Visit Disneyland on a busy day and then visit MK on a busy day and tell me which day you enjoy more. You can get far more done in Anaheim than Orlando.
TDO has decided that they have plenty of rides and attractions and they just needed to do a better job getting people to use them. They felt that if an attraction didn't have a line the size of a popular one, it was underutilized. Instead of doing something like upgrading or replacing the underperforming ride or attraction, TDO has decided it was too expensive to do this so they invented the other option - virtual queue management. Enter in MM+ and it's wicked step child FP+.
The problem now is that you've got your queue steering system online and you need to have "destinations" loaded into the system to provide the perceived value. If you can't keep a guest out of the line for Space Mountain by trying to steer them to Stich, maybe if you offered them Wishes that would change their mind. So, you start adding in FP+ on items like parades and fireworks. It's certainly a cheaper single spend than putting in another A, B, C, D, or E-ticket. Upkeep on a faux grass field won't cost as much as a Brer Rabbit on a stick that's for sure.
Simply supply and demand. WDW keeps getting busier; but, somewhere in the mid to late 90's, the supply chain started getting severely throttled. As attendance goes up, attraction capacity needs to go up as well. Actual attractions. Things that can cause a guest to forgo a ride on something else. If there are attractions not pulling their weight, upgrade or get rid of them. FP+ is like a parent trying to get a kid to eat asparagus after they already refused it 10 times in a row. "No mom, I won't eat Stitch's Great Escape! no matter how many times you tell me there's no wait".
For what it's worth, from the CGI render - the Hub refurb may be nice. The loss of the two waterways is unfortunate though.