There is no need to ask if there are lots of known issues in the current development build. They usually are fixed quite soon after they got known. The unknown issue are the bad ones 
So just try it if you want and report regressions if you find any.
For performance, current dev builds are mostly faster on the cpu, but require a faster gpu. But as long as you have _any_ gaming gpu, you won't notice. Just don't play on 4xIR + SSAA
So just try it if you want and report regressions if you find any.For performance, current dev builds are mostly faster on the cpu, but require a faster gpu. But as long as you have _any_ gaming gpu, you won't notice. Just don't play on 4xIR + SSAA