since i haven't read everything in the thread, if this has been said already, feel free to make fun of me.
Price isn't the only thing that separates Kershaw from ZT. Zt knives much more exotic in terms of design, materials (specifically blade steel and frame material) and tent to have substantially higher aesthetic appeal
I don't believe there's a single offering from CS that would qualify as being in a similar category as something like the ZT560. They have knives that are just as tough, but nothing with the fit, finish, steel quality, and design quality
In order for what you're suggesting to occur, CS would first have to design knives that fall into the Boutique Production category. At this time, they have none that i know of.
the other side of that coin is that before Cold steel can worry about having a line similar to the ZT line, they should first try to design a line of knives in the same quality range as Kershaw, within a similar price point
While they have knives as good as a kershaw, they typically run 4 to 5 times as much, and the ones that they have in the $15-$50 price range are nothing i would own