This article claims that all WIFI issues has been resolved in Windows 10...
Unfortunately I don't want to install the developer preview on my Pro3, (I have it on my Pro2).
Key reason is because if anything goes wrong then the first comment on any of these boards will be, "have you tested it with the original OS, as Windows 10 preview is not supported)
(Plus it's not unreasonable to assume that something released should work)