Just got finished playing through the demo and holy shit was it a delight!
The fluidity of the combat and animations are off the freaking charts. And the music! The music you guys! Already destroys FFXV in both combat and music. Completely annihilated it
Hope Taro makes more games under the Platinum Games banner. This is shaping up very nicely. I can only imagine what a Drakengard title would be like with this dev team.
According to a PC Gamer article from early December 2016, there is no plan of a simultaneous release of both PC and PS4 versions. (Source)
So no, no delay... just no simultaneous release.