I think it would be kind of cool to have a very robust, simple folder chassis, and then offer a range of blade options with it - perhaps interchangeable blades.
This would be a high-tolerance, low-B/S knife. Not a bling knife, not a disposable and not (necessarily) a folding railroad spike. Would have been my approach to the Umnum project. Guaranteed to put even the best-organized shop out of business.
As an example: Start with the Large Regular Sebenza. Add some mild ergonomics to the handle - MILD, not an art project. Add a pivot more like Strider's in terms of fortitude, but retain the bushing idea. Add Rick's dingus, just so we can say we have it.
Then pull-test some knives with full-thickness unground blade blanks, to see how they really fail. Make sure there are no disproportionately weak links in the lock and pivot. I kind of like the idea of keeping the single stop pin, but beefing it up. That's so much cleaner than using dual studs butted to the slabs. Definitely keep the frame lock. Screw all this fancy mechanical stuff - the frame lock rules! Lol.
Once you have the chassis dialed, work up a range of blades in different profiles, grinds and materials. You could have beefy SnG-ish blades, Krein-esque whittling, skinning and vegetable blades, wharnies, tantos... CPMX45QP stainless, INFI, good old 01, D2, etc... depending of course, partly on physical configuration.
Then, people could buy a chassis (or several) perhaps there would also be some top-slab material options (also interchangeable) and a bunch of blades to go along with. The blades would be priced a la carte on the initial order, and then there would be a fitting fee if you wanted additional blades after the fact.
So, a guy could get two chassis and maybe six blades up front. This would allow you to swap blades relatively quickly in the evening at home, or, you could carry two knives to cover a large range of applications.
I guess what Im basically talking about is a line that starts with top-shelf production components, and lets the buyer customize with options. But not just cosmetic customization.