While I appreciate the thought, I basically lifted the Live preview thing for my extensions from this one: MakeVibrationsExt for OFS So all credit should go to them!
And about the BPM thing, OFS has options to script to a set BPM, but you do have to manually type in the BPM yourself and change the offset, which means you’d have to know the BPM already. That’s all irrelevant, really. What I meant with my suggestion was doing the same thing with the patterns, so that they generate with points set to BPM, with a slider or input box where you can type the BPM yourself. Right now I can adjust timing and stuff with all the sliders to get close, but it’s not easy or perfect.