Fast access beats intricate organization.
Climbers often favor wide openings, clamshell or panel access and enough structure to keep a pack usable on the ground. The practical test is whether gear at the bottom can be reached without unloading everything—and whether the harness side stays out of dirt when the pack is opened.
Development question: Which panel touches the ground, and can the user reach shoes, harness or rack without dismantling the load?