The funny thing is I've seen TV and movies do cuts just like that. In the middle of a camera move/zoom they'll just cut in to almost the same thing just zoomed closer.
But when you do the same thing yourself it seems amateurish.
I tried to cut away just as Ron is about to be lost off the left side of the screen and the focus of the conversation becomes between Hermoine and Harry. That way more of Hermoine is on the screen while she is talking.
[the rest removed... babbling.]