Juz use the latest ddu to uninstall 16.12.1, u will be fine
DDU is best. It is much better than the AMD clean utility. But make sure you reboot into safe mode to do the clearn up.
Yes, there is new DDU version for all of you who want to get rid of 16.12 driver
http://www.wagnardsoft.com/?q=node/132Display Driver Uninstaller (DDU) V17.0.4.0 Released.
ChangeLog:
-Added support to AMD Crimson ReLive Edition 16.12.1