I just want to chime in my own personal experience with the V1 & V2 nomin since it's mostly opposite of what you've felt. Disclaimer: I like the nomin V1 much more than V2 but I'll do my best to be unbiased.
The V1 flaws you've listed I haven't either experienced or I think is actually an advantage. The ladder lock slipping easily I haven't experienced whatsoever and while the V2 excels at keeping the straps fastened it's very uncomfortable tightening the straps and I find the straps too loose even when I tightened it up to the max point. However the straps on the V2 are comfortable especially for heavier loads as it doesn't pull much into the pits. I've experienced difficulties using the zippers in the V2 around the corners rather than the V1. The zippers travel the corner smoothly in my v1 with a simple pull motion however for the V2 i have to guide the zipper around the corner and use more force. I don't know if the zipper on my V2 was faulty or not but my V1 gave a much smoother experienced around the corners. The floating pocket for both v1 and v2 are pretty good except the V2 has a slight advantage with this portion. THE V2 floating pocket is easily implemented with the front loading theme of the V2 (pardon my jargon i might be wrong) and doesn't get in the way while the V1 side loading floating pocket does serve it's intended use as a quick access pocket (i carry cables, keys, eye glass case, calculator, pencil case, or anything that I need to store or take on a whim) it really get in the way of using the front compartment for storage due to its placement and huge size. The V1 does collapse and sag on itself and that's related to how the front compartment was constructed. The front compartment's shape is odd, its structured at the bottom to the midsection while the top section is loosely structured by darts to provide some structure when it's not loaded. This leads to that sag where the top section collapses on itself when it's unloaded. Now I actually like this.. it breaks away from the "Boxy" feel people typically get from this bag and takes up less space when its unloaded but that's just me. I never saw the front compartment as a primary dump it all storage unit unlike the V2's front compartment but rather as a secondary dump it all unit when the main compartment is full. When loading on the V1's front compartment i like to shove objects with larger volume and odd shapes at the bottom and flatter or lesser volume objects at the top following the asymmetrical like construction of the front compartment. The bungee cord isn't really that hard to fasten or provides that much difficulty I think you exaggerated on that portion, I carry a laptop on the laptop sleeve, a textbook and some notebooks on the compartment ontop of it and I didn't experienced that much difficulty but I did experienced slight resistance from the bungee cord when fastening and that's pretty much it. I haven't felt fatigue in both bags with a laptop inside of it however I felt greater fatigue with the V1 when I'm carrying it using the top handle; the V2's top handle is better. Being a daily commuter often taking the bus and subway the V2 was uncomfortable to place on my lap as it protrudes greatly on any orientation due to it's length. Laying it flat on my lap sideways, along my lap, and even standing upright it felt inconvenient in smaller spaces as it reaches upwards to my bottom lip The V1 however i could easily place upright on my lap and is right under my chin and placing it sideways doesn't protrude greatly to the other seat. For some people this is a minor inconvenience however for someone like me who takes the bus and train 7 days a week it's a major inconvenience.
Again I did my best to write this as impartial as possible however i believe some parts came out biased..