Whoever it would be would really need to look closely at the C and D concourses there. Totally overloaded with pax, very claustrophobic, not enough seating at the gates, during boarding the lines trail out into the middle of the concourse where people are trying to walk by, bad air conditioning, etc.
All part of the superlative UAL travel experience. Damn, I haven't even got started on Mesa yet...
supposedly C and D are "temporary structures" owned by the airport and so UAL or anybody else can't change them much. they are total crap for concourses.