There is a large difference between Manufacturing and Design Airworthiness issues (which, you say, is taught at Sleaford Tech) and that of EASA Part M Continued Airworthiness Monitoring - a job I've been doing for some 10 years now (leading up to ARC standards).
I believe the latter is what would be best required by most RAF maintenance staff and would them help in understanding why they need to do certain tasks in a regular manner.
All civil LAE's need to understand something of both Design and Continued Airworthiness matters for their Licence exams but some do tend to 'drop it' as soon as they can! I'm sure the same would occur in the RAF, but at least they would have some knowledge.
Excuse my ignorance but...you mention "JSP 553" (a publication?) - could it be too high in RAF docs Heirarchy to be read by "mere" engineers?