I do not use an AMD GPU, but I have a spare AMD card around here, I have done some testing, and I have a temporary fix for the issue until AMD does something about it.
Step 1: Download the Latest version of Display Driver UninstallerStep 2 -
Download AMD Crimson Relive 16.2.2 Save it to your Desktop.
Step 3: Create a Folder on your Desktop called "DDU", Launch Display Driver Uninstaller and extract it into the DDU folder you created to your Desktop.
Step4: - open up the DDU folder and find the Display Driver Uninstaller exe and launch it. It will ask you to reboot into safe mode, chose yes.
Step 5 : After it reboots into safe mode, Open the DDU folder, Find the Display Driver Unisntaller exe and run it again.
Step 6: - In the dialog choose AMD from the Drop down box(you will see the AMD logo appear in the program)
Step 7 - Once AMD is selected, Choose "clean and restart"
Step 8: run the AMD Crimson Relive 16.2.2 driver package you installed early to revert back to the previous driver, then reboot your system.
Thats it. this will fix your ESO flickering problems. AMD is kinda slow on fixing things like this sadly. If you have other games that need the new driver, then you will be forced to simply deal with the flickering, shut off grass, or simply not play ESO.
Some background
I used to be part of the AMD Beta/driver feedback program for nearly a decade until about 4 months ago..
As someone who has first hand experience, I would not expect this to fixed anytime in the next 6 months barring a miracle. It was not fixed in their most recent release, and it may not be something they have listed as a high priority. As of late, lots of bug reports were simply ignored, multi-gpu support (Crossfire)put on the backburner for months, I am not sure why this was, but something changed over at AMD, and myself a few other long time driver feedback people pulled out shop and left due to bug reports and other such multi-gpu support simply being ignored for months on end. So that was that.
Good luck. I hope this guide helps those having issues.
Here is a few pictures to help you if you need them
https://www.sevenforums.com/tutorials/367109-display-driver-uninstaller-how-use.html
Edited by RinaldoGandolphi on March 24, 2017 4:00PM Rinaldo Gandolphi-Breton Sorcerer Daggerfall Covenant
Juste Gandolphi Dark Elf Templar Daggerfall Covenant
Richter Gandolphi - Dark Elf Dragonknight Daggerfall Covenant
Mathias Gandolphi - Breton Nightblade Daggerfall Covenant
RinaldoGandolphi - High Elf Sorcerer Aldmeri Dominion
Officer Fire and Ice
Co-GM - MVP
Sorcerer's - The ONLY class in the game that is punished for using its class defining skill (Bolt Escape)
"Here in his shrine, that they have forgotten. Here do we toil, that we might remember. By night we reclaim, what by day was stolen. Far from ourselves, he grows ever near to us. Our eyes once were blinded, now through him do we see. Our hands once were idle, now through them does he speak. And when the world shall listen, and when the world shall see, and when the world remembers, that world will cease to be. - Miraak