Just like the rest, no insider information, just a lot of reading threads and stuff. On the c++ front we'll have to see how the AppGameKit developers implement the improvements that Vulkan brings over Opengl.
But from what I've read of Vulkan, it could be an improvement in the graphics system over the Opengl engine but we'll have to see. On the tier 1 side the ide in studio looks like it is going in the right
direction on modernizing just hope it doesn't gather cobwebs once released like the Visual Editor seems to have.
Honestly I'm just hoping there is more than just an improved graphics system underneath the hood but we'll have to see once they get the engine fully working.