Great observations and planned use on this system. I use the same system with the large dry bag and the duffle. Both are $70 in addition to the frame. The scabbard is very very nice and makes pack a scoped rifle very convenient. Hope to see more of your thoughts and utilization.
The waste belt comes with the best one I've ever used. It also folds both forward and back which is good for storage and transport loading. Only thing I would change is a longer section of the thick part enough for another MOLLE position.