Interesting.
I stand to be corrected here, but is the MEL detailing what deficiency you can depart with outbound in inbound. When you are in the air you handle your problen in accordance with your emergency check list and make the appropriate decision. The MEL only becomes a factor once you have landed on land or offshore. The following definitions are unambiguous.
"Land (ditch) immediately" - Land or ditch
"Land as soon as possible" - Land at the nearest site at which a safe landing can be made.
"Land as soon as practicable" - Extended flight is not recommended, Duration of the flight and choice of landing site subject to Captains discretion, Take into consideration whether repair is possible at selected landing site.
"Continue flight" - Just that, continue flight