A couple things stand out to me in the photos. Shoulder strap attachment to hip belt and not frame like k3: this is huge for larger chested guys and is a vary good change for comfort. Hip belt is much wider to hug and grab your hips. Frame is not continuous across top for better head clearance. Load lifter straps appear to attach to webbing and be pulling off the frame a little which is vary weird. I’m also hoping the lumbar pad fabric is little more sticky. My biggest complaint with any pack is slipping. I’ve had slipping problems with Exo in past and finally got the k3 to work well after several try’s. Finally one shim with the denser foam worked well but I think little less stretchy fabric or little stickier fabric would really make it rock solid.