The video player on Roku shows the current time in the top right corner, the time the video finishes AND the countdown to 0 that the Windows player has. It would be great to have this added to the windows player as I realised how dependent I am on knowing what time a video finishes 
Also, on most screens in the app, the companion button is located on the right, but when a video is actually playing, the button is located on the left. For me it would make more sense to have the button located to the right so that it is consistent throughout the app.
Have I mentioned how much I love the app and the possibility to give direct feedback yet? 
