On the 4th of November, two days ago I have made the BIOS update.
All seemed fine, but today, after 2 hours of totally normal use (no stress test or anything) my FTW 1080 burned out with no symptoms or anything whatsoever. I had no black screen or freezing, or anything.
So this is a simple heads-up for those who has any doubts, for me the BIOS update surely not solved the issue. :(
The card was great, and by monitoring the GPU temperature there was no issue, but this VRM went out with a small smoke following... I'm super disappointed now with the product obviously.