I think I am leaning towards this now. My MBA card seems fine. temperature wise. I bumped power to 115% last night and ran through some TimeSpy and Port Royal benches, and the Hot Spot seemed to top out at 91/92 degrees, which is fine. It didn't appear to be throttling. Fans went ape. TBP topped out at 400W. All good.
However, there is always that niggling thought at the back of my mind, much along the lines of future value. This MBA "issue" is going to tar all cards, regardless if they were affected by the problem or not (I mean, at this stage, we are still guessing at the scale and percentages of people who are/have been affected by this issue and owners will have no way of proving if their card is ok or not to any future buyers). Mainly because of this, I would prefer to spend a bit more, get a Nitro or similar and rest easy that its resale value in the future, while obviously never guaranteed, is not going to be potentially marred by this problem.
However, can I realistically RMA a card that, as far as I can tell, operates perfectly fine and is without fault?