I certainly see your where you are coming from.
I think a few of the players are just unhappy with the club in general. Docherty and Yeo both had a good run this year. But either way, if players are homesick it comes down to the player welfare department. Unless they are just saying they are homesick as a cover up of why they really want to leave.
Also the recruiting department which should be able to better identify these sort of issues. The recruitment of Karnezis was always a interesting one as the "homesickness" talk start almost a soon as he got on a plane to brisbane it seems, plus polec who looked shattered when he was drafted by us. We are near the bottom of the pile for players draft wish list so must really focuse on those who can adapt better so far away from home