i7-6700k
GTX 1070
16gb 3000mhz ram
Around 30-60fps outdoors and 140fps indoors seems like the new Terrain Textures/The new unity distance terrain kills performance.
The Indoor performance is what I was getting on A17. Mediumish settings for reference
Also got the same issue reported it in the bug thread only reply I got was "Try Lowering Resolution" A17 ran perfect for me but A18 performance tanked so much. Hopefully they can figure out the issue and get it running better.