thanks for all the input, folks!
that’s precisely my thought /: would really like two aux at the least. the keith mcmillen approach does look pretty neat, i have to admit! some further research also lead me to think that the Allen & Heath QU 16 might be very good to use (thanks @kisielk! great tip!) … it’s the size of a normal mixing desk, but i may be able to live with that.
also, there’s the Allen & Heath QU PAC which seems perfect if one can live without faders. it has a bunch of assignable buttons and a touch-screen (which makes handling it probably a bit more flexible than using the X32 rack). if one is willing to go with a tablet all along, last there’s the QU-SB, excelling the X32 due to the fact that it has jack inputs (X32 has only XLR).
i’ll def be selling my X32 – all options of these and the above seem a better approach for me 