I have sometimes been a strident critic of Deans
but I can actually see what he was trying to do, and I think it is actually what Link did in the first couple of games with the Reds this year and what Kidney did with SOB with the Irish. The role of the 7 has changed and if you don't have a supreme fetcher then I believe a fetcher who gets penalised regularly is a liability and a player who can pressure the breakdown and counter ruck can provide more.
The big mistake Deans made, and it is one that he has made time and again throughout his tenure in that he is unreasonably loyal and possibly pig headed about changing view on a player. McCalman is an ineffectual 8. He has no impact at the breakdown playing his favoured position why the hell he thought it would be any different with him at 7 is beyond comprehension. Add that to the fact that Elsom remains seriously out of form except for a few brief flashes and you are left with a back row in which the only effective member is Samo (who I will add wouldn't have got a gig if Palu hadn't been injured all year). Further to the woes are the "saviour" of the second row Vickerman still has the same issues at the breakdown that cost Oz dearly in 2007, discipline.
It all adds up to a poor breakdown performance that selecting a specialist 7 will not automatically fix.