I have been away for work so I have not tested the new driver yet.
With the 3316 driver I did revert back to a clean Windows 8 install instead of 8.1.
But that did not solve the problem of Netflix refusing to work with 5.1 audio.
Is suspect the issue started due to changes on the side of Netflix, but I am not 100% sure of that.
Anyway, since support at Netflix does not seem to be able to solve the issue and it does like a driver issue I hope Intel can solve this.