I'm not entirely sure how I feel about the Richard Bellers effect, I've pretty much figured it out now and in truth I didn't like the shoe twist which was really only put in there to make back tracking harder. The prediction should have been in the brief case the extra phase was actually illogical in my opinion. Bellers was clearly just terrified of being caught out loading it into the case.
I also want to add that while Kramer used tricks and presentation which weren't his own he was still far more entertaining than Soma. He'd picked a presentation style which suited his look and personality very well and had a lot of charisma and even used his "I'm a cute little boy" look to his advantage in winning the audience over. So I'd say he's got the tough part nailed he just needs to learn and invent and that'll all come with time and experience.
I agree with you on the shoe twist, the effect wouldnt have been so bad IF the reveals had have been something that was actually predictable. I mean how can you influence 2 people (who cannot play darts) to throw a dart where you want them to throw it...Yeah you could have made it appear as though you influenced the words, but COME ON 'Housey'?? thats not even a real word!
If he had have thrown in a near miss there with 'Houses', then that would have been a lot more logical. The effect wasn't consistant darts and then words? They are not even in the same context as each other... He came up with a way to load the shoe and then built a RUSHED routine around it.
If he had of made penn and teller wear airport workers uniforms, then opened the case and got teller to put on the glove, performed the gag and then said something like 'I admit it officers, I am carrying in my shoe' then they took the shoe off, at least this would be a scenario where it seems a little more in context. (but still stupid but at least the joke would have been in context)