You could also argue that the kicking in general play is a major weak point for the Wallabies and the Brumbies have the strongest focus on general play kicking so their players will get a selection advantage in that area.
The Reds had the best overall set piece in 2014 so their players will be advantaged when it comes to those selections because the Wallabies have to place a bigger emphasis on scrummaging in particular.
Players who demonstrate superior fitness and physicality will likely be looked upon more favourably. Halfbacks playing at pace will be looked on favourably. People seem to be suggesting that these aren't universally beneficial traits for rugby players and that their provincial teams won't benefit from that.
Team tactics can certainly hurt a player's chances of being selected if they really don't allow them to show off the skills relevant for a game plan similar to that of the Wallabies, but that was true under McKenzie as well.
I agree that players that made themselves first choice in 2014 will have an advantage in 2015. I disagree that it's because they play for the Waratahs.
Phipps, Foley, Hooper, To'omua, Kuridrani, McCalman etc. clearly have an advantage over players like Pocock, White, Genia, etc. because they were first choice in the team less than a year before the RWC.
Players who weren't part of that first choice 23 at the end of 2014 are playing catch up regardless of where they play.
But if Chieka is a good coach and he wants better kicking then why won't he be working on it at the Tahs next year?
If he wants more emphasis on set-peice then why isn't he working on it at the Tahs?
2014 there was no Tah bias. I agree. But 2015 there will be because Chieka has 15+ extra weeks to work with players on exactly what he want from them at the wallabies.
To say traits are universally accepted is only half true. Who's to say White wouldn't play a quicker, sharper game if he was at the Tahs? Or who's to say To'omua wouldn't be playing flat and attacking the line like at the Tahs. They have 15+ weeks of playing a balanced game involving a heap of kicking game, and Foley and Phipps have 15+ weeks of practising on how to play a wallabies game.
You said it yourself, team tactics can hurt a players chance of being selected, therefore
certain Tahs players have will have an advantage in 2015. Incumbents can and will hold their spots but a Tah is certainly the most likely to replace one given they have practised the same structures for a whole season.
To be fair, given the circumstance this is not Cheika's fault. But having him as Tahs coach and Wallabies coach is far from ideal, it is a bad for Cheika, bad for other players from other provinces, bad for wallabies preparations, bad for Tahs players at winning super XV again, but great for the Tahs players chances of being a wallaby.