I've had one for 10 days and have very few complaints, added to which it's got generally better specs than my old HTC One M8 at 55% of the cost. Given that I always buy off contract, that's a big factor.
NFC: had it on the HTC, never used it. Seems to me NFC is pretty useless in the UK.
USB-C: different, just like switching from mini-USB to micro- was, and I've no idea why the article says "And the supplied USB-C cable doesn’t fit any regular USB plugs or ports, although it should" because I have zero problems with it. Also it avoids the usual Lovecraftian geometry that requires you to have at least three attempts to plug USB in.
Oxygen OS: not really stock Android. It sits over SELinux, has user accounts, and can control app permissions so you don't have to live with the over-generous rights grab most apps seem to have these days. It's remarkably quick to encrypt the phone as well - it warns you that it will take up to four hours, then does it in about 7 minutes.
Can't persuade the damn launcher to give me a 6x4 grid though, and I agree the lack of customisability of the quick settings is a PITA, although you can reorder them (unlike the article claim).
Fast charge: no big deal for me. The battery lasts me two days normally, one while travelling and using maps a lot (plus being in the wilds so the phone shouts harder to out of range base stations), and I charge overnight.
Fingerprint scanner: works fine for me unless I have wet hands (maybe Andrew O moisturises a lot?). Setting it up automatically let me use it for unlock (as well as the PIN I'd set up), no problem.
Camera: if I want seriously good photos I get out the DLSR. Good enough for using as an aide memoire, and the only reason I use selfie mode is to act as a mirror so I can see the backs of monitors when plugging cables in.
I'm far from a typical phone user, but for my use it's great. The only major problem is the ridiculous "invite" system - I'm somewhere around number 500,000 and only have my phone because I know a OnePlus 1 owner who got an early invite and took it intending to resell.