If the engineers are good then there will still be jobs in Scotland for them, Ryanair, Monarch, Cityflyer and Storm are looking for people at EDI.
Nobody suggested that a move to Manchester was because English engineers are better than Scottish engineers but more because of the recent consolidation TOM/FCA and TCX/MYT there are plenty of experienced support staff looking for new jobs.
One does wonder though if they were all so great how the fgs engineering dept got itself in such a state and ended up needing sorting out by new management.