I just posted and then deleted a thread which I think was entirely a subconscious rip-off of this idea.

So yeah, this would be good. If there was a way to record into and zoom in on the lookup table it could have a similar function. It seems like the one tricky part about this might be that editing would be a lot different based on how many samples there are and what range of values they cover, and also whether or not there's more than one value at each point.