Thank you Droptrotter for the timed test, couldn't ask for any more insight
The board and Vendor have been really helpful in me developing a feel for the system. So far in my mind the traits of the Kreiga system over my current Coyote:
Pro's: Waterproof (big points), more packing friendly shape of the rectangle than the odd shaped Coyote
Con's: Rear buckle interferes with seat comfort (in my eyes at least), strap intensive for compressing bags (8 total to adjust versus 4 on Coyote) that adds a bit of ergonomic complexity but may benefit with a more secure load.
My only experience with side bags was when I ran Dirt Bagz on bikes for a few years.
So I had a strap across the rear of the seat. The Dirt Bagz strap was even less intrusive than the Kriega however after sliding back and forth across the plastic buckles for a week it became annoying. I even tried to place the buckles out of the way as possible as suggested by Droptrotter, but could not get them completely out of the way.
One issue I had with the Dirt Bagz was flopping about over rough terrain.
The Dirt Bagz were secured seemingly along the same attachment point locations as the Kreiga: Over the seat srap, foremost bottom corner of the bag to the frame, and rear most high point of the bag (DB was mounted with a sleeve over a bracket mount at roughly the same point). Why would I expect the Kreigas to be that much more stable?
Again thank you for the frank discussion.