I have made similar request 5 years ago. :)
Track list in xml format would be nice. Exaple:
<tracks>
<track>
<name>Track1</name>
<fx bin>
<effect>
<type>VST2</type>
<id>3123-adb5-6433................</id>
<plugin settings></plugin settings>
</effect>
</fx bin>
<and here all the other track parameteters>
</track>
</tracks>
Inventory in xml format would open all kind of possibilities... And even if SONAR suported importing such file back (but that's another feature request).