In terms of newly-qualified Fg(RPASP) officers, I don't now. I think the current level of overwork experienced by the Reaper Force is tied to the relentless HERRICK tasking and UOR manning levels (if some US guys feel underworked, I'm sure some of 39/XIII would welcome some exchangees
), so I presume the Force will change markedly in 2015.
I do know of someone (a "normal" pilot) who wanted to move on but was extended for a year to cover the period out to the end of support for HERRICK. Other than that, there seem to be plenty of people popping up at OCUs over the RAF fresh from a Reaper tour without being kept on that fleet.