Simply put, i would love a per-slider inertia control for the hydra device. In this way, a single slider change could create wide, varied morphs.
Alternatively, a simple inertia/interpolation device that takes an input and interpolates from the previous value to the new one and spits out the interpolated value. Input -> inertia -> output. Linear interpolation would be good enough for most cases. This would let you “sweep” effects with a single effect command instead of automation. Would also let you “sweep” across patterns.
I thought of this mostly because of my Korg Z1, which i use as my primary controller. It doesn’t have endless rotaries, and has an awesome x/y pad. Unfortunately, the pad doesn’t interpolate. The result is a ton of controls where accidentally touching one will result in an abrupt change in value, which is rarely cool sounding.
So that’s my whiny reason 
That said, inertia on devices is a great thing, and i think the application would be well served to have broader access to that functionality.