Sorry I should have detailed my goals, expectations and requirements in my first post.
I'm not looking for an all-in-one solution, I make music in the box (iPad and Ableton), and was looking for a little 'plink-plonk' machine to jam and stay away from a computer screen. But I hear you regarding limitations.
The ALM System Coupe is fantastic but it's just too big for me, I want to be able to easily put the rack in a backpack.
This build is close to what I typically use in miRack, but I agree it could use some attenuverters and VCAs, I initially had a 2HP attenuverter instead of the Trim. Cold Mac, as suggested, seems like a Swiss army knife that could handle VCA duties?