If there is scope at Sandhurst to accept a larger training commitment; you should send the RLC Officers back there to learn how to manage and lead without reference to those skills previously learnt at Deepcut.
Wallop will soon enjoy the same status as Netheravon and Upavon. That HQ JHC was built away from an airfield might be politically correct insofar as not advertising single service biase, but for sure Defence Estates have missed a trick and so sealed the fate of DAAvn in its present state.
That said, IMHO the colocation of all helicopter support elements at an airfield such as Hullavington would have been the optimal if expensive answer. Even if no flying sqn was actually based there. However that boat has well and truly sailed, even though MoD Stafford or at least TSW in addition to Colerne (21 Sigs) could have closed and the JHSU hangar given back to Odiham for their new Chinooks. I suppose the same could be possible at Benson if and when Merlin flies away.