I recently switched to a X1C6, and I wholly agree. It's an amazing laptop in terms of hardware and build quality, but it does have a bunch of Linux compatibility problems.
The Arch wiki page[1] has been tremendously helpful in getting set up. However, I think the length of the article goes some way toward showing that compatibility is far from perfect.
The trackpad / NFC issues seem to only be present on laptops with NFC behind the trackpad, so my recommendation would be to avoid that one if it's possible to get a similar model without.
[1]: https://wiki.archlinux.org/index.php/Lenovo_ThinkPad_X1_Carb...