I agree with that, Dan. It does look like at least one thing could be changed (Grosgrain Loop).
On the other hand, the others may not be, now that I think about it. The back panel uses a foam pad as a way to go multi-use. Putting a ventilation system would move the weight even further away from the body.
As for the hip belt and the suspension system, perhaps the lack of a connection between the two is so the hip belt is more easily removable. It may also allow for the hips to move more freely and naturally than otherwise. I don't have this pack, but maybe GG could put small sleeves for the frame into the hipbelt, somehow giving the option between connected and not.
The shoulder straps seem a matter of personal preference with some people loving them and others not so much. Perhaps there could be a recommendation here to have two strap width options?
Finally, speaking of recommendations for improvements, in looking at the Mariposa Plus, now that it is available with the same aluminum stay as the Gorilla as opposed to the old carbon fiber stays, would it now receive a 'Highly Recommended' rating? Also, do they have similar weight carrying capacities? The GG website says no and I was curious as to why.