Hi Ronnie, I guess your example figure of 75% is based on 25% being ripped by a C15 or Control:PC or Control:Mac whereby tracks don't carry any meta tags for identification.
If a user has used EAC, dBpa etc. to rip CD's and import to Sooloos and thus has files WITH tags, then SB and Sonos would read the store and show 100%.

I got very close to 100% when I ran both systems reading my MD600.

If M were to do something to make reading a store more effective, then I personally would modify the meta tag tool to take Sooloos album info from the album fse file and write tags for the track files of the album. M should also change the CD RIP program to NOT strip meta tags.

A tagtool does this today during export. It would be almost the same but without the export.

There are obviously others ways to achieve this. The above is just a thought on how M could do it to align with Roon if that is what JB means.

Rgds,
Nick