So on PS4 and I assume xbox if you go with a puppeteer layout for your controller, the O and the R3 switch for duck. only problem is that R3 is what the new class ability binds to. The solution is for bungie to please move the class ability on the puppeteer to the O button. Please make this happen soon. It reallys sucks to want to duck and cast your healing aura and then die, thus not only not ducking but wasting your aura (on a warlock, whatever for any other class) and then dieing because that's about the last thing you want to do in a close firefight.