The setup they have is more like a cattle call than an organized series of lines. This can cause serious bottlenecks during times of high volume.
OIA could take a lesson from their friends down the road in Tampa. You don't go through the TSA screening until AFTER you ride the tram to the terminal, and they have two or three distinct lines for you to get in. It's a MUCH smoother process.
Unless Sunpass has changed back to the old box style again without telling me, (which is entirely possible). :) As a frequent driver of FL's toll roads, and one that gets new cars every 3-4 years, I'm glad I have the box that can move from car to car. I've often wondered if local car rental companies offered Sunpasses to their renters.
FYI, for those that have never driven from OIA to the theme parks, you WILL pay at least one toll to get to your destination, unless you want to take local roads and go a bit out of your way (and risk getting lost or confused). The 417 is the most expensive, it's the most direct to WDW, but it's also the least backed up.
I don't know, I guess since I live in the Boston area and have to deal with Logan airport, I see anything else as an improvement, which is why I am so impressed by Orlando.
Leaving from OIA is another story. We are the 'typical' Disney vacation family. The family that goes for a week and usually arrives on a Saturday and leaves on a Saturday. If you rent a car then you really should plan on getting to the airport about 2 1/2 hours before your domestic flight. The line at the security checkpoint for us has been at least 30 minutes on 3 of the 5 occasions. We have flown Southwest 4 out of the 5 times and the line to check bags has been about 45 minutes 3 out of the 4 times. The rental drop off surprisingly is fairly quick, maybe 10-15 minutes. So between checking bags, dropping off your rental and going through security you are talking about 90 minutes. Then you still have to take the tram over and walk to your gate.