As much as I like AUG ( Anyone who grew up with Die Hard! ), getting stuck with a 5 round proprietary magazine pretty much eliminates my desire to buy one. The new magazine release on the F90 also needs to be depressed fully into the stock to release, this means it needs to be hit with the thumb precisely all the time, a problem in Canada with heavy glove wearing cold weather. Obviously it is not an issue in Australia but it is in places with low temp winter. It is as unnecessary as the bridge around the bolt release on the HK416A5 - making improvement for the sake of improvement.
Another very big issue with the AUG ( and also F90 ) is the lack of real hand guard and the side mounting gas venting regulator. It is almost impossible to mount a basic tactical light ergonomically. You can't mount it on the left, because there is a charging handle with no rail space. Mount it on the right, your light is going to be reflected off venting gas in low light and it will lose at least 1/3 of the illuminating area by the shadow of the barrel+receiver, unless you have a very long cantilever. Even with that, you need to tape switch it somehow and it has no where to go other than the vertical grip. The only thing that works is the antique vertical gripped surefire M900.
For all practical purposes, as a "tactical" rifle, AUG/F88/F90 will not cut the mustard. The very basic stuff needed is the mounting of a light and then IR laser, that can be quickly manipulated. A 9 to 5 rifle is useless in practical environment. For nostalgia, I may consider one when the NATO stock is available, but I doubt it will be used much. The X95 may not be the most accurate, but you can actually mount all the necessary items and manipulate them, albeit it is still not as efficient as an AR15. We will keep seeing the RAR commando using HK416 and M4, and the grunt will be stuck with whatever creates jobs at home.