The I-Drive stop makes perfect sense. People coming to Orlando are going to Disney, Universal, the Convention Center, or all of those and more. Disney is being short sighted with this and I think it will come back to bite them. If they really wanted the exclusive stop then they should could have said they'd open the station as a hub at Disney Springs not just for their hotels and parks, but for all of the Orlando area attractions. The I-Drive proposal has Universal giving the land and the station available to everyone, not just for the use of Universal guests. BIG difference.
Yes, an Uber is cheaper (at the moment) but I don't think gas prices will ever drop down to where they were, and the roads keep getting more congested. America is terrible when it comes to mass transit because the car makers and oil companies purposefully made it that way by destroying the railways we used to have. We are the only industrialized country in the world that is so completely dependent on cars to get anywhere.
Brightline will bring people from all over South Florida without having to take I-95/I-75/Florida's Turnpike/etc which are already strained with traffic and the population keeps growing. I-4 is a miserable mess much of the time because we have too many cars and not enough alternative transportation. I LOVE going over to Tampa/St. Pete/Busch Gardens, but rarely do because traffic is horrible. I would LOVE to get on a train at I-Drive that could take me to Tampa (or Ft. Lauderdale, or Miami) because those are all horrible places to drive just like Orlando is.