I believe there was a bit of a 'down' on Indian Army officers in higher ranks. From memory I'm not certain, but I think only 1 made it to Corps command (apart from the Indian Corps, of course). Although a lot on IA officers on furlough were co-opted for the K Armies in 1914/15, at higher levels in France they got poor rations.
Presumably, the Home Army people all knew each other and socialised, whereas the IA types were too busy doing proper soldiering (
); additionally, fighting tribesmen on the Frontier was a bit infra dig, compared to running a decent scheme at Aldershot.
OK, I'm being deliberately provoking, but I think the IA senior ranks were rather overlooked. I'll try and check over the weekend.