Bug report has been submitted, though I have found a possible solution for Overwatch, and listed it in another thread.
"Hey guys, think I found a fix for Overwatch.I noticed the flickering was similar to The Witcher 3 when it first came out. Tried it with the Witcher 3's profile and the flickering stopped, but it would crash after a few minutes. Someone in the Blizzard forums said that they had the crashing stop with 16.8.1, so I upgraded to that. Sadly, it did not help. So I tinkered around with the profile a little, the combination that seems to work so far was to limit the frames with FRTC and to disable Frame Pacing. No flickering and no crashing! For now."
And no, I didn't roll back, but moved up to 16.8.1. I've yet to try Battleborn.
Battleborn Update: After much screwing around and checking for other games that have had similar issues. First I only tried games with a similar engine (Unreal) and was having limited success. Then I tried Lost Planet 2's profile, and it worked... kind of, still had flashing occasionally... Played with some settings, and the following seems to work: Anti-aliasing Mode - Override application settings, Anti-Aliasing level - 2xEQ, Anti-aliasing Fliter - Standard and Anti-aliasing Method - Adaptive Multisampling. So far so good, trifire in 5760x1080 everything cranked and now no flickering.
Hopefully these help others!
Battlefront is still broken....