The 2C doesn't have the connection points for a dock, that's part of the features they cut back on for the budget option. It also doesn't have the RGB or the buttons on the underside of the controller. I'm happy with my choice but I've also been tempted for the higher end version for all of that stuff too

On the QC thing, the 8bitdo controllers are less "refined" than a dual shock or an Xbox controller. The abxy buttons have a little play side to side in them and minor stuff like that. They're slightly lower build quality than the big name controllers, but not in any way that will affect gameplay or responsiveness. The joysticks have tuneable dead zones, you can test the pressure sensitivity in the triggers, and fully configure the layout to suit your needs. They connect without a hitch and the 2.4g is very low latency. I watched a few vidoes comparing controllers when I was looking and the QC thing came up too. I was a bit apprehensive but pulled the trigger and, with the experience I've had (on cheaper controllers no less) I feel that a lot of professional reviews place an undue emphasis on their QC. They may have been lower quality in the past, but I genuinely haven't had an issue with them and they've held up great so far