predictability might be the main thing. But
http://www.overclock.net/t/1606224/...-less-compute-parallelism-than-doom-aots-also
http://www.overclock.net/t/1606224/...llelism-than-doom-aots-also/180#post_25365469
What stands out to me is that the compute tasks wait for graphics tasks in the chart futuremark provided.
I doubt think it will transfer to actual games.
I don't consider myself knowledgeable enough to understand the implications of what we see in GPUView screenshots(or most people on this board and especially not on overclock.net). I do know that it's technically a D3D tool, and results from a Vulkan application might not even be accurate in the first place.