We have a miniDSP SHD (not Studio) in our TV system. I also have an Anthem STR Preamp in my main system. Both have DSP: The miniDSP has Dirac, and the Anthem has ARC. I prefer the interface of the Anthem, but both provide effective DSP, and the miniDSP may be more suitable for your application.
Like yours, my room is treated for acoustics.
I find (and have found through the years) that addressing the bass with DSP can make it much smoother sounding. I have found that worthwhile, for sure.
The miniDSP streamer can be controlled with Roon or any DLNA or OpenHome control point. Also, you can use a Web browser to control it with the native Volumio interface. If you decide to use it, you might be able to simplify your system a little.
I hope that’s helpful.