i've been using plugin~, actually, not vst~, which doesn't really work for me because i can't get some variables to work without appending "Cutoff Frequency", "Center Freqency", etc [ i assume, but haven't successfully worked out. does vst~ require this stuff as well?].
Basically vst~ parameters are indexed, but they have names as well which you can query. In future versions you will be able to use change parameters also by their names.
best greetings, T