Now the all new Messenger will support a 3d touch on the i-phone 6s. It will let you view the photos, conversations and GIF and lot more in a 3D view.
But now also you can't switch off the option of Read recipients even if you only see the pop-up of the message and not even read it completely. But it doesn't effect too much.
This feature is not pretty cool but you will definately like this because it will let you do your work in a little fast speed.