A:AnswerIf Fortnight on PC allows controller play (I don't know, I don't play Fortnite) then the answer is Yes. The controller is Bluetooth and compatible with Windows, MacOS, Nintendo Switch and Android (and likely anything else that takes a Bluetooth signal). It also has charging cord that can hardwire it to devices that don't have Bluetooth. If you have an Xbox One S or later or a Playstation 4, you should try using those with your PC since they're both Bluetooth and may likely work.
A:AnswerThere most definitely is input lag. I purchased through Nintendo though. There's like 250ms input. There's also heavy frame drop when you turn the camera.
I think this port is a little sloppy
A:AnswerZL and ZR (the L2 and R2 equivalents) are analog but ONLY when used on a PC in Xinput mode. When used on a switch or in DirectInput mode, the triggers are all digital, either full on or full off.
A:AnswerYes, it has its own driver that allows you to re button map. Not sure if can be done in the switch, but driver works just as well with a lit more utilities such as stick activation or triggers.
A:AnswerConcave buttons aren't bad it helps with the feel to differentiate the buttons, i wish they would have a multicolor concave and convex button one on a black controller