I think Robertson added 0 value to the wallabies last season. Can't hit hard, can't run hard, can't dominate any collision and can't dominate International tightheads. Sooner we identify another up and coming loosehead to develop under Sio and Slipper the better.
He was no worse than the other LHPs who played during the season though (Smith and Faulkner). The issue for the Wallabies was that there was no good candidate to fill that position.
I agree that it would be great for another LHP to really improve and start demanding selection.