How do you know they were seperated for 2 years? Wasn't that just a rumor?
Jon appeared to LOVE the attention on past seasons and it seems to me that he was only annoyed because he was getting caught at bars with college chicks. Remember, he couldn't be 'just Jon' or go anywhere without people knowing? I hardly think he really wanted out of the show especially since he's been in the limelight all on his own these last few weeks. I don't believe Kate said he wanted out of the show. She said he wasn't happy staying home so she encouraged him to get a part-time job or go back to school. Then she said they bought the house to make him happy too but that didnt work either. IMO he wants to have the $ from the show and not have to work for it. And he's still doing the show isn't he? Even though Kate isn't with him.
As far as Jon getting his ears pierced, it seems like more of a syndrome if you ask me!

Textbook mid-life crisis. Let's do the checklist again shall we? Earrings? Check! Adolescent clothing? Check! Sports car? Check! Hair plugs? Check! GF's that are too young? Check! Doesn't like his job? Check! Bachelor pad? Check! I know I'm forgetting something!