xf86-video-ati 7.9 / xf86-video-amdgpu 1.3 DDX Driver Updates

[MrCooper]

So is there a advantage over just using the modesetting driver?

Everybody has to ultimately decide that for themselves, but one example of an advantage is TearFree.

[MrCooper]

bridgman is this wrapper one of the pieces needed for the transition of radeon to amdgpu in distros?

Not really. If xf86-video-amdgpu is correctly installed, it should already get automagically loaded by default when it can work. The change here was basically to prevent the ati wrapper from loading the radeon driver for GPUs which are driven by the amdgpu kernel driver, which can't work.