A pc version is set to release in early summer 2020. There are no plans for an XBox release.
yes, there is close combat and a lethal and non-lethal weapon system like MGSV. Unlike Metal Gear, killing a human enemy is not recommended and creates consequences.
theres 15 episodes, if you focus on main episodes the game is 40 hours long, but if you do other things like side deliverys and building then you will take 90-100 hours or more