No there is not an undo feature on the mix console.
As for the ‘multitude’ of complaints… every single time there is a Cubase update, there is a multitude of largely pointless moaning. C8 is probably the best .0 version I can remember. Seems rock solid to me. Complainers will always find something to complain about.
Sorry still thinking this is not practical, with 100 changes every few minuets, it would take more time searching the history, than just adjusting back some changes.
A snapshot feature, where you could make unlimited and name able snapshots of the mixer, that I could/would use.