Suggestion: onion skin quantization.

Like the onion skin in cartoon animation where you see the where was the image on the last frame. In cubase it could be a quatization onion skin. When you quantize but you still can see where the note was placed originaly. Then you can shoose if you want to quantize a note or not.

You’re in the wrong forum for suggestions. Cubase 6(.5) was succeeded by 7 two months ago - that’s where new development is.