KB4016250 is live NOt sure if anyone has mentioned but they seemed to have pushed the button for KB4016250... The small OS build update to 15063.11
So there is literally no difference between what we have now and what will be official on the 5th? (other an official ISO vs ESD)
Well seams it just updates ntoskrnl.exe, securekernel.exe and usbxhci.sys to version 10.0.15063.11. I believe there will be more patches untill Apr11.
fyi, KB4016250 is NOT applicable to obscure versions such as Enterprise G N, LOL......I should know, I just tried, not applicable