I think it needs to be a lot more optimized for who uses devices like external drivers through USB 3.0 port, because the speed is too much instable and also needs to be pushed to the max possible to use the devices at their maximum performace.
I don't see many drivers coming often, i think it needs to have more often updates drivers.
I'm using windows 8.1 x64 in this right moment and i'm planing to upgrade to windows 10 x64 when it gets released.
Thanks.