That is a mess. We had some collapse too. The PB will recover it. We did have some issue later after the gunite in the same area of our collapse. The patio people did not back fill enough. We had two major rains and the ground sunk in the area. We are fortunate there was a delay before they laid concrete. The patio people will bring a a tamper machine to settle the soil better in the area. This is something they should have done in the first place.
So overall do you feel the collapse effected or will effect the quality of your build long term? Do you know what they did to fix your collapse?