Yeah I'm going to sell mine. I'm using an XB1 / Wii U Pro controller instead. It does the job!
Any benefit of the Wii U Pro vs an XBox One controller?
Yup:
1) digital triggers - even with trigger locks on an Elite controller there is still quite a lot of travel. Having purely digital triggers means ADS is instant, feels so @#$% good.
2) max spin radius is smaller, so it's easier to do rapid left / right peeks. The Switch Pro controller has the same spin radius as the XB1 pad so in a way the Wii U Pro is better than Switch Pro.
Now I don't hold mine like a regular controller - it's not comfortable for long periods of play. I rest mine with the middle bottom part on my lap (
https://imgur.com/a/4zzte), and the Wii U Pro has some further advantages for this:
3) The triggers have plastic under them to prevent them from scraping up against my lap when I pull them. The XB1's triggers touch my lap which adds friction. Switch Pro has the same problem too.
4) the base is wider and flatter than the XB1 pad so it fits more comfortably on my leg.
I've tested pretty much every controller under the sun and this plays the best IMO.