hmm, perhaps we need an expressive controller w/ eurorack topic,
we did discuss this a bit over at polyexpression.com
anyway, I’ve recently been enjoying using the Soundplane with modular, what Ive done with that, is use a Bela Salt , this goes directly from Soundplane hi-res data to CV, so skipping midi ( * ), and also allows me to tweak the data.
(*) same tech, works for the Eigenharps, and should work with MPE too 
Ive not done the video yet, but here is the same thing running on a Bela to the AE modular.
(hmm, really must get the eurorack demo video done!)
what I found was…
if you don’t teak the data, things can be really dependent upon what VCA/filters etc your hitting, e.g. in the above video you’ll hear the odd ‘quirk’ caused by the VCA behaviour, that just doesn’t exist when I use Veils on the eurorack.
I don’t have (nor want) a large polyphonic eurorack, rather I have a collection of different voices.
so rather than using per touch control for ‘polyphonic’ touch, I use the capabilities for splits.
this way I know, when Im in certain areas of the surface I know what voice I’m hitting.
I also have limited CV outputs, so 8 cv output + 8 gates, so with 3 dimensions, I divide that into 4 zones.
two main zones with 3d, then two virtual sliders at each end. (each with gate)
(of course its simple for me to use the outputs differently e.g. 4 zones with 2d)
anyway, I agree with above comments, really the expressive data can need a bit of massaging, you could do this various slew/attenuators etc, but is a bit easier to do it in software.
I do find it an enjoyable to control eurorack, i guess in a similar way to the way others use pressure points, ribbons etc… its just a a bigger version really 
of course , there also is another approach, with something like Bela (or I guess percussa SSP) ,
use the module as an MPE/expressive enabled polyphonic sound generator/oscillator… its a bit limited, as most modules have very few audio outputs … (bela has 2) , so it becomes a bit like a paraphonic setup - but still can be very cool… its not something Ive explored much yet, but I do want to 