Hi,
I’m not sure that will be popular but writing score using advance vsti with lookahead feature (like MSS fro audiobro) you want to constantly(!) switch from -440ms (playback) to 0(record live). The only way for now is to ctr/click the value to go 0 and enter it with numpad to go -400.
A simple on/off function like clicking on the clock icon would help alot.