I get where you're coming from.
My reservations aren't just about the Ohlins though.
As your suspension thread clarifies, lots of suspension 'works', but what suits your brief? Without knowing Ohlins brief for this kit, what it's for, what it's not for, and what the other expectations are (bushings, arbs, tyres, alignment), it's a bit useless for a consumer to make any decisions about.
Buying it to try it is a quick way to blow money and time!
So yes, the ranges of the damper are ultimately adjusted within the provided springs ranges and expected weight of the car... possibly more for weight than for changing the spring rate... assuming many buyers of this kit track their car and have maybe lightened it quite a lot... but then also be ok for road use with a few passengers.
But then it brings me to think about the Koni Sports being adjustable on rebound. We can move the weight up and down a lot in the car... say from 250kg in a lightened racing 130i, to 330kg standard, to 430kg sprung mass per corner in a fully loaded car with luggage.
Without knowing what you're getting on the bump side, never mind the rebound side, it's a bit of a gamble with any setup where you don't know the background of it's reason for being.
Earlier I'd mentioned about ride rates. You provided motion ratios.
I think I calculated the ride rates for the Ohlins setup incorrectly.
I'm certain:
Wheel Rate is pretty much = Spring Rate (Motion Ratio ^ 2)
So front wheel rate is 0.9 * spring rate
Rear wheel rate is 0.32 * spring rate
Assuming 50:50 weight f/r and l/r, it's about 330kg sprung per corner
So you get this, give or take:
View attachment spring_vs_ride.PNG
So this Ohlins would seem to provide ~ 2.2hz front and 1.6hz rear
OE is ~ 1.3hz front and 1.25hz rear
It's surprising that so much extra stiffness is added up front, which ultimately adds understeer, while the rear is left quite soft.
It seems many higher end kits do this, and deviate from the usual road setup of a stiffer rear, possibly because the ride height issue with a loaded rear becomes less important as it deflects less, but also because for track work you probably don't need the ride comfort consideration of a back end that settles faster than the front (for stability feeling)
But then I do wonder about kinematics at the front and the stock alignment all around. And even then, bushings get a much harder time, likely deflecting more and so non-controlled kinematics may play a bigger part in not nice behaviours... so a desire to upgrade everything so it's firmer... but then NVH etc.
Either way, all interesting stuff.
Likely the Ohlins is very very nice... but probably a track setup?