Pricing is a wildcard, but an equal wildcard IMO is density of aircraft (less than 40 A330 freighters worldwide). AOG and parts become a real reliability issue to be resolved. Bigger wildcard, why introduce a new fleet at this point. The MD's will last long enough to allow a network built around 767s and 74's that would compete successfully against 777/767 networks. 767's are a productive moneymaker. Will be supported for decades thanks to USAF and Purple new production as well as current orders at UPS. Link that with no new fleet introduction requirements, no new sim types, no original vacancy bids and have best package with eliminating MD and replace with combo 74/76 network at best network and labor cost.
But logic often matters little in these decisions
