Silvan-CIG: The Multithreading for Vulkan is already running internally in our dev branch and the results look very promising. We are seeing massive speedups in comparison to d3d on the RenderThread (RT).
Don't forget that this doesn't mean it will improve your framerate since we're still mostly bottlenecked by the MainThread (MT), but it will certainly have a positive effect.
We are integrating these changes into the main branch right now so there is a good chance it will be in the next big release.

ABrown_CIG: Slight correction to Silvans post… The Vulkan multi threading changes won't make the next big release, because that is already in the process of being stabilised and won't be taking a new dump of code from our main branch. So it's more likely (but not set in stone) that it'll be the second major patch that gets the major performance and stability improvements to Vulkan, and this may also include being enabled by default (depending on how Evocati testing goes).