I've been looking over the WROOM32 esp32 reference design and written up some notes here:
http://41j.com/blog/2016/09/the-esp32-wroom32-design/
It looks like the design files might be in OrCad, I guess they can't be exported to Eagle/Kicad but it's something. It also looks like it's a 4 layer board which surprised me, guess I may have to start working with 4 layers.