On present plans VR(T) will get it, as will the ATC Adult SNCOs/WOs who are arguably more "civilian" than RAFR(CC). For example, CC are subject to the Armed Forces Act, while Adult SNCOs are not.
The apparent criterion is "receiving remuneration for volunteer uniformed service." In practice, it looks like the preparatory staff work consisted of digging out the QGJM regs, crossing out "QGJM" and inserting "QDJM"!
TTN is - of course - correct on mounting order. There is an incredibly detailed list in AP 1358, which is not entirely intuitive. I put my QGJM in the wrong place initially, as I (wrongly) assumed that my ACSM counted as a campaign medal, and would come before the Jamboree Medal. In fact the ACSM is technically a Long Service Medal and so comes after the QGJM.