Even though it's likely none of the US phones are having issues, IMO I would still replace the phone. Reason why is because of resale and trade in value of a old Note 7 will be basically nothing. So even if you Note has no performance or quality issues, I'd still get a new one anyways. Plus if you scratch the glass or something or dropped it you can get a new device!!
I'm holding onto mine and will swap it out for a new Note 7 most likely, BUT since we have at least until Sept 30th on tmobile I'm going to see what the V20 brings and if it's out later in Sept I will go and swap it out and get the difference put back on my card since it is supposed to be a lot cheaper than the Note 7. I can then use the difference and buy a couple spare batteries and multiple cases.