CxA change during project?

Although me or my firm has not run into this before, I would expect that a change in CxA would not prevent you from achieving the credit. Changes in the CxA can come about for many different reasons. Emphasis would need to be placed on ensuring that all required services are performed and nothing gets lost in the potential change in Cx providers. I would suggest that you move quickly to address the OPR and BOD for this initial building get the design review completed so any potential improvements can be included in your design documents.