Thanks for looking into that for us. I have to say, I'm still kind of murky on it, as the settings sure look like they would affect the software curves for velocity and aftertouch. I wonder if Pierre-Antoine wasn't referring to some very specific settings when he said that they'd be used for something like splitting channels. At first, it looks like he thought you were asking about the weighted response curve of the keys (being able to change that would be incredible!), so it could be there was a bit of a communication barrier on his end as well.
This is good info for our advisement nonetheless, and I'm glad to see a customer service experience much better than some of the reports I've seen.