With respect i dont expect FR to return any time soon, they will be more intent on getting LBA up and running, dont forget they also have a large base at EMA and seem to want to maintain some presence at DSA.
Assuming the weekly Malaga flight works then perhaps FlyBE may see potential for routes to ALC PMI and FAO too.
There is strong demand for TFS and LPA, i believe ALC and AGP have worked year round in the past. I would disagree about Monastir though as i believe that is the only one which under-performed.
We must not forget that one of the busiest years the airport had was the year after DSA opened so i believe the threat from over there is somewhat exaggerated at times. It seems that its all about getting the right operators in to support a modest and sustainable schedule. It seems that putting all their eggs in one basket is not realy an option they want to go down.