If for some insane reason another pack knife was done, I'd recommend two things. First is a short short short period of discussion and voting on design. The other is charge retail or very slightly over retail to avoid non-packers trying to get in just for a cheap knife. It seemed like a bunch of the most vocal problems with the pack knife never posted about anything but it, and haven't posted since. The idea itself was cool, and I think it also attracted and got more people like myself more involved in the forum.
There's definitely interest in another knife. Sadly the best way to avoid most of the previous problems would take away some, but not all of the interaction of the first.
Course, we could also just do a pack edition special run of firekits, and anno them orange