Same garbage, MS just shuffled things around and as far as game mode goes doesn't bring any improvements...just a gimmick since DX12 didn't live up to hype.
DX12 does have performance potential, it just needs to be taken advantage of by drivers and game devs. Look at NVidia. A pretty decent boost in DX12 games from a driver update.
That said, no one thought DX12 was going to bring an insane boost. At least not normal people.
Movie Maker won't happen because it is too complicated for garbage called UWP.
UWP has nothing to do with it. It probably has to do with cost of producing it vs return or even monopoly issues. Microsoft did get fined to hell and sued for including basic use apps before.