Years ago, Andy Stanford used to shoot an AUG in our SCTC program. (That's the original version of your new rifle.)
Although he called it his "Awfully Ugly Gun," in his young hands it did really good work. (Well, of course that was mostly Andy, not the AUG.)
I got to use it briefly, once or twice, and I was very favorably impressed with its ergonomics and general layout. Barrel-change (or removal for cleaning) was quick and easy, as was field stripping. Reloads were pretty easy too. And I loved the sighting system.
The two-position fore-grip was best used down as a sort of monopod. Offhand, things worked better for me with it up.
My only complaint (but not Andy's) was the difficulty of jam or dirt-in-chamber clearance through the tiny ejection port. I guess one could just as quickly remove the barrel to resolve most of those problems.
Anyway, I bet you'll grow fonder of it every time you use it.