These last few years all of the Big Brothers I've watched have seemed to be interfereabce-heavy. UK Time bomb, to example, or the current BBUS, where the 'twist' was that there would be a celebrity 'takeove' every week. It has been building up, the instances of Big Brother changing the game, sometimes with real influence on who goes home, who is nominated etc.
BB Takeover, however, has already seemed to have dropped the schtick these last few weeks - perhaps because they realised that their cast was perfectly capable of being entertaining and playing BB without interference.
So, perhaps the pendulum is swinging, and when BBAU returns, it will be in a 'classic' mode. A change of network would be perfect for that.