I don't know if it's been mentioned, but the gap in between Legacy and MoS will be even longer than the gap between MoS and Returns.
12 years vs 7 years.
It's faithful in that it recreates panels and moments from Watchmen. But missed the point of the source material.
It glorifies in the violence the graphic novel was satirizing/condemning. It lionizes Rorschach, who in the book is a conspiratorial bigoted asshole.