Just a clarification if people didn't know. The actor who played Kutner (Kal Penn) was actually offered a position in the Obama administration as Associate Director of the White House Office of Public Engagement, which is why he was so abruptly written out of the show. You notice you don't even see him in that episode, probably because he had to leave so quickly. He is only in the season 5 finale for one quick line thereafter.
Anyways, I really like the direction the show is going. The whole medical focus can only go so far before it started to get old. I started loosing interest in the show until the whole staff change up and they started to go more into character development.
I was going to say this too. I'm amazed at how many people don't consider Penn's new job as a reason why his write-off was so abrupt and didn't make much sense. The writers were handcuffed and did the best they could to get him out quickly. At least his death made House's spiral out of control all the more believable.
I guess this might be a bit blasphemous but I think I may like Season 4 the most. It was the most unique season that had the most twists and stayed away from the formulaic episodes the most while pumping fresh blood into the show. This show has always made changes just when it's about to get too stale and that's good work on the writers part. It hasn't come close to jumping the shark yet, just had some ups and downs like every other TV show aired. A good example of House jumping the shark would be him going bi like someone suggested they wanted to see in the Season 5 finale thread. That would be utterly ridiculous if he had a love interest in Wilson since it goes against everything he's done up until this point and it'd turn off many viewers (myself included). That's what jumping the shark is, when it goes against the mythology that the writers have tried to build for the sake of being 'new' or 'exciting' because they are running out of real ideas. Let us hope the show ends before it ever gets to that point.