Here is one idea. I don't do pre fader reverbing on the instrument track. Instead, I send them to dry aux channels, and then the dry channels to reverb channels. So I would have a "Strings Dry" and a "Strings Wet" aux channel (and then one for percussion, winds, keyboards etc).
Then I send my solo tracks into the appropriate "Dry" Aux channel. I then do a send from that Section Dry Aux Channel (you could do your "pre fader" on this send) to its appropriate Wet Aux channel. This will now completely control the entire wet/dry level of the entire section.
Now you would be able to "mute" individual tracks and they would truly be muted. Try this one one track to get the idea.
1. Load a blank project/template and add just 1 software instrument track.
2. Open the mixer window.
3. Hit the + to create 2 Aux Channels. Make them Stereo, and for input, select Bus 30 and make sure "Ascending" is checked. This will make the second Aux channel Bus 31.
4. Name the first Aux channel "Violin Dry" and the second one "Violin Wet".
5. On your Violin Instrument track, do a "Send" to bus 30 (dry) and turn it up all the way to the maximum (this is only for showing you how it works purposes).
6. On your Bus 30 Aux Channel, do a "Send" to Bus 31 (wet) and set the Send to "Pre Fader" (it will now be green).
7. Record a series of notes with a violin just for testing purposes and loop it so you can play around with step 8.
8. Now that you're looping your test track violin, go back to Aux Channel 1 (dry) and push your Send level to the maximum and watch the reverb kick in. Turn it all the way up so it's way over done just to prove the concept. Now you can also adjust the channel gain on this Aux track since it's set to pre fader and will affect the total dry/wet mix.
9. Now hit "mute" on your violin unstrument track and notice that no information gets through, not even reverb tails for that track.
Is that what you're looking for?
Maestro2be