While I appreciate some may be upset at being denied permission to wear foreign medals, that hardly compares with watching a ten year old child trying vainly to stop the spray of blood from a wound you've just inflicted on his father. Thankfully the hierarchy apparently do appreciate the extreme stress and that PTSD isn't associated solely with personal physical risk.
There is another big source of stress here, brought on by the very close monitoring of every decision and action of a RPAS pilot; that of legal accountability. It is entirely feasible that some lawyer even in ten or fifteen years time after scanning the slow-motion replay of an engagement may decide someone needs to be prosecuted.