I think for each Insert, there should be an option to do internal Oversampling. That means, if this option is checked, that particular insert will work in higher sample rate.
[So, Audio will go into the Insert after being up-sampled, then after the audio comes out of the plugin, a steep Anti aliasing filter will be applied in the 20KHz region and then the audio will be down-sampled and go to the next insert. Just like the Oversampling usually works]
It will be really really helpful to have this option.
If someone needs it for a particular plugin, he will turn this on for that particular insert.
What I want is something like this (The picture Below) but for all insert. So if we don't want it, we will not use it. But if we want it, we will use it.