Why is the textbox transparent? I haven't seen the actual transition in action, but it certainly looks sloppy this way.
However, if this is actually happening in some transition, then leave it. We all know that there are only so many hours. Bring some polish to this transition with a future update. I can't see dinging them on design for a slightly sloppy transition.
They did have a nicer one in beta 1 though where the message came up under the keyboard blurred
IMHO, this is the opposite of sloppy.