Actually there is a way. Not an obvious one and I've seen no mention of it anywhere, even the chaps at Adobe UK were unaware of this.
So rather than drag layers to the tab - the obvious method, you select layer/layers you want to move, switch to Move tool and drag from image, not layer panel to the tab you wish. Wait....and then the tab switches and you can drag layers onto image. If you hold shift key down it also centres. A bit clunky, but at least it works.
Dragging layers to tabs was very much asked for in the beta testers forums.