as another commenter said, the drivers brought this onto themselves. i think the impact of uber driving around waiting for a ride, + booked ubers double parked waiting for the charge to arrive, adds significantly to congestion. without getting into the uber/taxi debate, you could just see (and hear the honking) how difficult it was for the buses to get through even during normal traffic.
another quiet change that happened nearby, is the closure of union square w between 14th & 17th. theres an extremely high amount of pedestrian traffic, and near the edges of the square there's intersections that would get pretty dicey. now it's much, much better. to be fair, ny drivers are decent, but there's just too much volume (and pedestrians looking down at their smartphones). i'm sure people got hit on an almost daily basis. ironically, i'm more afraid of bicyclists hitting me than cars. they simply do whatever they want.
but still, i firmly believe these changes are a huge positive overall.