You’re talking about inertia. You can find something similar on the native Filter, where it’s possible to smoothly slide from one cutoff to another. The idea of adding this type of inertia to the meta devices has been discussed a few times in other threads. Recently, kRAkEn/gORe actually scripted something that you might find useful, if you’re using the latest Renoise 2.8 beta: Inertial Slider