It could,but I can see Polaris doing much better with tessellation and at lower resolutions in DX11 games,and things like minimums being improved too.
If they can get faster than Fury X performance from such a small chip,I would be impressed.
Edit!!
The improved command processor and the primitive discard hardware would be what I am looking at.
The instruction prefetching and greater L1 and L2 cache should casue a lot of the shader performance improvements. The improved commander processor should improve Shader Utilisation, so more of the shaders on the die are actually being used without needing Async as often.