For me I reset the cache with the WSReset command then logged in again and hit update all on top right. When trying to hit update button beside the game image it wouldnt and then was looking 80GB free on the drive, ARGH!
The Win 10 Store App is terrible, I hope they fix it sooner rather than later.
The game however while some mission are a bit meh, is graphically really good and looks brill with all the excellent shading/lighting. Its great with Phillips Ambilight lots of colour from explosions/lightening/blood splatters filling the room. Im really enjoying it using the XB1S pad with my subwoofers and Buttkickers cranked waay up.