I play singleplayer mostly, and I run around for a while to find clay as well. Then I kinda forget the shade and get excited when I see copper, mistaking it for clay
I'm playing with an average 100 fps, but have stuttering quite often. Maybe it's just a part of the game right now, and they will fix it in the future (It's EA after all). I'll let you know if I manage to fix it ¯\_(ツ)_/¯.