My fried told me that, generally, the latter two need to be exposed and separated by the composer/orchestrator to be clearly audible, otherwise they just color the tone or merge with the violas for instance. --> turning the flutes up in my mixer would have been the right choice, possibly. But turning up oboes and clarinets maybe not (in my particular case they play in the same register as some other instruments)... do you see where this is going?
Not fully sure. 😊 But the bottom line here, I think, is that ultimately this is more a matter of orchestration and arrangement, than of settings and values. Of course, Woodwinds often blend in for orchestral color, or round off the edges. But then again, they're used as conveyors of central musical ideas, exposed lines and virtuosic passages just as well. And whether they stick out or blend in - isn't it entirely up to the intention of the composer and has everything to do with the number of players, the "architecture" of the composition, if/who doubles whom and which musical function everyone else in the ensemble has been assigned to?
Woodwinds are used for all kinds of things - color, texture, melodies, solos, harmony, ostinati, ornaments, runs and flourishes ... and they blend (or don't) with other instruments to manifold effect. surely you can't follow one general rule for all these highly distinct applications and their "mechanics".
I personally use MIRx most of the time, and I do have natural volume activated across the board. But I can't remember a single project where I left CC11 as well as the mixer faders untouched - there's always something I need to change. And it's never the same either 😊
A software can provide a reasonable starting point, but it can't "know" what music you're writing. It's helpful, it provides a guideline, but unfortunately (?) it can't keep us in safe waters until we have gained a somewhat reliable ability of judgement, or relieve us of the need for it.
So in the end it does come down to: knowing what you want to hear and what is possible/reasonable (although we may take the liberty to disregard this in the world of sampling every now and then) and adjusting settings accordingly. Which, in turn, requires a lot of listening to music, analyzing and learning. You're obviously doing that anyway.
As much as it is an annoying truism - the whole "use your ears!" engineering mantra really is the answer to a lot of questions ... well kind of 😊