It would be nice to not only be able to lock parts, but be able to save parts as a 'sub-preset' for arrangements you use a lot...
Many times I have wished - argh this would be awesome if i used the same Chorus effect as this other preset, and have had to trawl through my library to go and get it, rather than selecting a drop box from the section and selecting a saved preset...
Maybe you can just select the preset itself in the list and VC just grabs the chorus bit from that preset...
I might be alone on this - as the section locking is pretty powerful, i also reckon that this would be hard to implement on the virus itself, where it would be REALLY helpful...