Really? I'd say this episode was funnier than usual with the probation worker unexpectedly doing karaoke, why did you think the pregnancy bit was pointless?
Yes the whole missing penis thing was a bit absurd, and didn't really work as well as it could of, but it was only a small part of the episode really.
Amnesia isn't a power, we don't even know if that is her power, she just happens to have got amnesia, her shadow disappears in the opening credits, I get the feeling she may have not have actually existed before the storm happened, it would explain why noone is looking for her, you'd think at her age even with amnesia she'd have had friends who'd recognise her on the street and explain to her who she is.
Rudy isn't getting stale, he spent most of the episode being lovestruck, which showed a different side to him (whilst remaining hilarious throughout,) the crude jokes have been in from day 1, the first episode had Alisha simulating a blow job on a water bottle for Gods sake!
Whilst Finn is a poor character in my opinion Jess is a very good character, far more interesting than most of the original Misfits, it's too early to really know what Abby is going to be like, I expect Jess' boyfriend will get ditched soon, now he has his penis back I can see him turning back to his old self.