I agree about the problem with the gates at KORD. Last summer, we left from K13 to fly to Honolulu on a B767-300ER. The return flight brought us into K16. Unfortunately, the radius of these gates at KORD is set too small for B767 aircraft in the FSDT software. According to the Boeing site, the wingspan of a 767-300ER is 47.6 m. The radius of Gate K13, like most others, is 22.0 m in the .bgl file. That will need to be increased to a minimum of 23.8 m, as will all other B767 gates.
Which gates will that affect? I looked at AA flights out of KORD for the last two weeks on FlightAware. B767-300s used 9 gates -- H15, K7, K9, K12, K13, K15, K16, K19, and L5.
All flights using B777-200 aircraft used just four gates -- K13, K16, K19, and L5. Since the 777's wingspan is 60.9 m, those 4 gates must have a minimum radius of 30.5 m. (Studying the satellite photo on Google Earth makes me think gate L10 can also support B767/B777 aircraft, but I didn't see it used in the last couple of weeks.)
This just affects the AA gates. I haven't checked the International gates in Concourse M, or the United/Continental gates in Concourses B and C.