Today I paid for the extended warranty for my GTX 1070 FTW because I fear that these thermal problems already have damaged (or will damage) my card.
I advise you to restore confidence very fast and if you are sure that these problems will NOT damage the cards, please extend the warranty for all customers/cards affected by this thermal problems .
From 3 to 5 years. Free!
It will be a very good way to prove to your customers that you are confident in your products .
Regards