Gone Fishing
Another thing to keep in mind is the volitilty of the airline business, over the years I have worked for seven airline companys (that is just for flying) two have gone bust and another two are more or less out of business.
If I had been a low time MPL holder my chances of re-employment would not have been good simpley because the training would have been so "customised" for one company.
Airlines are funny things when it comes to SOP's in one airline the pilot who flys the approach hands over control at decision Alt and the other guy lands the aircraft ( no auto throttle disconecting permitted) as I say "nout as strange as airlines"! It is that sort of thing that is going to limmit the employment prospects of MPL holders.