Thanks for the suggestion. We are working on a bunch of updates and we have this on the list already (though honestly it's not at the top, yet). The general thought is to provide an option to either have it act as it does today or minimize to the tray, depending on user desire.
Thanks again for letting us know how we can improve as it's super important to the team to make the experience even better and if you have other thoughts or comments, please let us know!
Thanks for the reply. Having an option seems entirely appropriate.
The other thing you guys might do is publish the app into the Windows Store using Centennial. That'll make the discovery/install/update story a lot easier.