Very welcome. The bus runs only between B&C and is hardly large enough or frequent enough (and there are both practical size & frequency) limits to acommodate the new AA/US operation, including the fact that an arrival on B with a departure from the commuter "gates" means taking two buses. More importantly, the B-C bus means walking down and then up metal outdoor stairs. Hard enough for the fit, but someone with even minor concerns and a carry-on is better off walking out into the main concourse and then back to the B checkpoint.

It also makes sense to create a commuter terminal as the boarding and off-loading via bus and crowded C gates is a mess.