These characteristics seem to be a trademark of Bjorn's. ALL of his pedals are open -- unless you choose to close/compress them up. Having this freedom gives a great deal more room for tonal and sonic shaping. 90+% of the pedals out there simply do not have this trait, and it is all to Bjorn's credit that he designed this moldability into his masterpieces.
I am reminded of the raw openness of the CH2, because if the pedal started out compressed, there would NEVER be a way to unwrap the sheer girth of those tones. On the other hand, you can also compress the CH2 to death and get a fat, heavy wall of rock.
One could say this about any of the pedals. I am finding this to be true of all my BJFe drives: the MHvT, the EGDM and even the PPF. Perhaps because many people are used to the finely tuned and compressed driven tones from the studio, having the ability to expand their palatte with more flexability becomes a challenge when trying to "nail" a certain sound. The great thing is how more types of "sounds" can be effectively nailed with BJFe drives (+compressor and EQ) in place.
More importantly, I have noticed this character influencing my choice of stacking in recent months because the openness of the BJFe line can shine through the other pedals in the chain to alter their norm sound. For example, I have a Custom Shop BB Preamp MB, and while I love the way that pedal sounds by itself, it takes on a whole new dimension when I stack it with a HBOD or my FF DLX on lower gain settings. Having the midrange tweakability of the BBPMP with the openness of the BJFe makes the whole sound heavenly.
I can quote Donner's common reminder that simply adding a SBEQ to your chain will make an incredible difference tonally. If you can improve tone with a SBEQ, why not mix in some others as well?
Have fun, gents.
Cheers.