Yeah, he bit on that flea-flicker, got called for a somewhat ticky-tack penalty, but I too liked what I saw of him. He covers guys closely, for heaven's sake. He's not content with just keeping receivers in front of him. Had a couple good tackles as well.
Overall, I agree. Mistakes were of the 'rookie' variety that should just improve with experience. He did show off his hitting ability a couple of times.