: An Employer has decided not to undertake some additional works for reasons only known to them at the current time. NEC3 ECC Option A.
Only real negatives to the Employer to instruct CE’s after Completion is that the Contractor will not be pushed to carry out the works in a certain timescale, as they will no longer be threatened with delay damages if they have achieved Completion. Also the defect date will be fixed following Completion, so there will be e reduced period for the extra works for which the Contractor is liable to correct defects. You may also want to check things like insurances if that could be any issue.