Yes, from the reading I’ve done on Port Patrick the PPR intended to use it and lots of plans were made, the Admiralty pulled out and the CR preferred Stranraer... it was therefore not a success in part due to a number of ships running aground and problems with weather related/sea related dangers!
Yes I could definitely move services to Stranraer Harbour and have Stranraer Town just being used as the run round and goods yard. It would certainly make operations easier but displease some local passengers I expect