TBF, I think the talent drain has started to slow.
With the exception of one Jim Stynes, it's always been the half back Flankers whom claimed the most amount of success. To varying levels of success, but all considered competent enough to play 20+ games, Pearce Hanley, Zach Tuoey, Colm Begley, Marty Clarke, Tadgh Kennelly and the other boy who came over with Stynes (name escapes me) were all half back Flankers. Setanta O'hailpan was another exception (although he came from Hurling, so I'm saying he doesn't count). The failure of Tommy Walsh, who probably came with the most hype of any Irish player in the 20th century, has probably put off AFL clubs from bringing in the big blokes. The cherry on top is that the AFL and GAA have an agreement, that only one Irish player can be a rookie listed player, limiting the number of speculative players to 18.
As a result, most of the clubs are going for the Americans, Kiwis and "alternative athletes" which is a fancy way of saying talented sportspeople who haven't played AFL in at least 3 years and are happy to accept a low paying contract.