have you turned off Dx11? i had rippling textures to , yank dx11 and its gone.
turn off light shafts, motion blur, depth of field too. these things are frame hogs and dont really add much.
your rig is significantly more powerfull than mine yet i can pull a decent frame rate all the time , DX11 isnt optimised properly and is known across the forums as a troublemaker its best to turn it off.
as for your gameplay experience , give the game a chance once its running ok its solid (if occasionally buggy) and the community is good.