Hi, I really like the intiface integration, unfortunately the passive arousal setting messes with all the other interactions due to how RPGMaker handles things (it basically spams the commands permanently). I figured out a solution for this. I modified Plug2in to be able to support passive vibration. Here's the modified js file. What I did is add 2 new commands: startPassive() and stopPassive(), used exactly the same as start() and stop(). The difference being that the new functions won't overwrite currently active patterns, instead triggering them automatically when the queue is empty. What you need to do is edit the passive arousal common event (0735) and replace every instance of start() and stop() with the new functions.
The passive insertable setting also kinda messes with things, however I'm not sure yet how to fix it. Similar problem being that RPGMaker just likes to spam the command so it overwrites everything else.