I think the problem with the Proper is that it doesn't really look like anything. It has modern construction, traditional mechanics, but no traditional styling whatsoever. It has a nail nick, but it doesn't look like a traditional nail nick. Both blades look weird, especially with the rather obtuse saber grind.
It if was styled more like a classic traditional knife, I'd be far more interested. For example, we have those knives that push the accepted (in this forum anyway) description of "traditional". The Moki Fish Owl, for example. Or these wonderful shadow pattern customs with modern handle materials. Traditional style, traditional construction (pins, not screws, etc), but modern materials. My Jim Dunlap gentleman's trapper might look all futuristic with its lightning strike carbon fiber, but it's still a slipjoint with pinned construction and a classic blade shape. And then we have customs with more modern construction (screws, not pins, etc), but classic styling. Or production ones like the Lion Steel barlow. Sure it's got screws, you can take it apart and adjust it, but it's still very obviously a barlow.
The Proper however, doesn't look like that. It looks like a modern knife with an antiquated (in relation to its styling) opening mechanism. It looks like it should have a Michal Walker linerlock, thumbstuds, and a pocket clip. Might as well get a modern knife with a modern lock and open and close it 2 handed if you want to fool someone that you're not carrying something "tactical".
It just don't fit.