The processing speed is connected to capacity of the CPU; how many times can current workload be handled. Low number means high load; and high number means little load. I know, this can be confusing. % would be more intuitive (0-100%). No processing speed means that no CPU is used for the playback of the audio (in term of DSP). Of course, there will be a CPU load for pushing the bitstream out, but this is minimal.
Looks fine but I would turn off any EQ on the Blusound as you really don’t need it .and do it all in Roon as it’s adding extra external processing outside of Roon. Doesn’t affect Roon but it means it’s going through another DSP chain and may affect sq more.