He had 1 very good match and 1 solid match w/ Knoble on Velocity. He had good matches tagging w/ Spanky, a teaming which garnered some good face pops. All his other matches involved him getting squashed.
Can't speak to his mic skills, but (as I said above) his non-squash matches have been pretty enjoyable/good.
They shouldn't be relied on to sell tickets & shows - that's not their job. It's the job of the guys on top to do that. They can, however, be used to help the midcard, as opposed to being fed to Hossy-Come-Lately who the fans won't care about. People aren't calling for London (or any other cruisers) to be ME'ers, but there's no reason they can't be used effectvely in the mid-to-lower card.