Someone with more knowledge than I may assist here: It seems unlikely to me that Dura is playing high through choice. Is it more likely that he is playing in a system that calls for that? He's had some cracker games for NZ against better opposition than teams in the A League and we have praised him for those performances. He doesn't strike me as the type of player that chooses to play in a style that exposes him regularly, but he does strike me as a player who will play according to the way his coach tells him to.
If it was a one off, you could put it down to tactics for that particular match. But he did it with previous managers as well. He's the sort of defender that everyone thinks is fantastic because he makes the odd critical block, but in reality it's because of his poor positioning/reading of the game. It wasn't so noticeable when he was younger, but now he doesn't have the legs it's blatant.
I actually think the shape and organisation of the back 4 looks better when Dura isn't on the pitch - which is strange given his experience and supposed leadership ability.
Like with Siggy, there's a nostalgia with Durante that he is still perceived as being a great defender, but that was several seasons ago and he's playing past his used by date imo.