My biggest complaint is the wrap-around hipbelt... if you could offer the option of a beefy fixed lumbar pad with a pass-behind belt that would be great. More load stability.
Good move on lengthening the harness. It's currently too small.
Instead of just military/hunting colors, why not offer an option that would target the general backpack community, like a standard "forest green" or red? Your packs are getting a lot of good press on general backpack sites.
Happy Thanksgiving, and Best Wishes to your business this coming year.