The Klon is a true icon of pedal design. The circuit design alone is truly original born of a very simple and strong concept. It was never intended to be a Swiss Army Knife but rather solve a very specific problem, and it does that better than any pedal out there including the Tube Screamer. For me though, it works best when stacked with another overdrive or fuzz pedal.
All true.
My Klon KTR works great set as a boost driving another pedal. I use my Klon KTR either alone or to drive my Hot Cake.
With the two stacked I can get a huge, heavy, snarling rock sound with tons of bottom. Not that I ever use that tone live!
I read an interview with Bill Finnigan and he said that he designed the Klon to make a Strat sound more like a Les Paul.
I like Brian Wampler's pedals but as you said, what he did with the Tumnus and Tumnus Deluxe is create his idea of an "improvement" of the Klon sound.
For people like me who don't want the Klon to sound more dense and generate more distortion and who don't want the Klon to lose its clear top voice, the Tumnus doesn't work quite as well.
Setting the controls straight up on the Tumnus Deluxe, and then tweaking them, going back and forth between it and my Klon KTR, I can get close to the sound of my Klon and I can dial in some great sounds.
But the transparency of the Klon is not quite there. The Tumnus is too dense sounding, and I'm sure it's intentional.
I'm sure too, that like the Horse Meat, it's what the guys who think the Klon doesn't have enough gain, gristle and overdrive are looking for!