Back to the special power video, which I just watched, I like the stopping time thing, but I understand Dubs comment about what exactly stops and what doesn't. I don't like mind control though, as I agree with the theorists that it would drive anyone insane, especially if you can't turn it off, or you find out all those things you really shouldn't know. Ignorance really can be bliss.
I think on balance upside vs downside, shape shifting really has most powers covered.