Here's what the Official OnePlus Launcher (Play Store) description says:
OnePlus Launcher is officially on the Google Play: Designed by OnePlus team, fast and stable, this launcher allows you to easily set up your home screen by finger-tips;
WYSIWYG Settings: WYSIWYG - “What you see is what you get”, OnePlus launcher provide options in the most intuitive way. You always can preview the changes before you apply them. Just a glance, stay cool, no need to check it again and again.
Organize your life in Shelf: Shelf is a space that only reserved for you. Basically you can place what you want in it and make it your own way. Also we make something special for you such as weather info, quick notes and recent launched apps. Hopefully a simple swipe can help you find all you need for the whole day.
Secret gestures: Under the options, we preset gestures for you to quick access notifications and the search. Try swiping up or down on your home screen and you will like it for sure.
Customize your icons: OnePlus launcher support a wide range of icon packs. You can change them simply by a tap in options or drag an icon to the top. In addition of our default icon packs, there are hundreds of icon packs on the market for you. Download your favorite ones and give them a try.
That Said, the OnePlus launcher features a lot of influence from Google’s Pixel Launcher. Since the beta was already full, and the listing has been taken down. We'll let you know once the OnePlus launcher goes live again on the play store.