Makes me wonder. Do any suspension shops use some sort of linear 'dynamometer' that would allow them to mount a fork leg, or both legs, and run it/them thru a set of computer-controlled movements, at different fps speeds, measuring compression pressure and rebound damping at various parts of the fork stroke, so that there would be a real set of constants one could tune to?
This whole suspension thing seems like such a crapshoot.
I would hope Matris & K-Tech have dyno's and tested things when they developed their kits. They have a desired curve (test results) they are looking for.
But then a local ish suspension shop that installs a Matris or K-Tech fork cartridge probably does not have a suspension dyno and instead they rely on Matris/K-Tech's testing and setup info.
In the dirt bike racing world, several high end suspension shops have their own shock/fork dyno's and do lots of "lab" testing and track testing. From that they develop their suspension settings/kits. When you send your fork/shock to them they do not dyno your fork/shock, but look at their setup notes and revalve your suspension based on all their previous testing.
And if Factory Connection did your suspension, it would probably be different than if MX-Tech or Kreft Moto or Stillwell Performance did it (dirt bike world here) ... as each of these shops have different ideas/theories on what is best. So they don't even agree on the best test results!

But these guys are not just winging it, crap shoot style.
On the other hand, there could be a suspension shop where a person with a lot of experience just experiments, revalves, rides, revalves, rides keeps refining things until they like the result, no fancy shock/fork dyno. Then when a customer wants a revalve they use their notes/settings to do that revalve.