WP ineffective, a nuisance to deal with and the board got....well... bored with his vitriolic rampages on the locals. For the past year nil senior VP's listened to his "I am the CEO!!" red faced rants. This was his first and last kick at the CEO can. Stepping down? He got the boot back in November and has been on leave for the most part.
Good luck WY - you have a decent airline you just need an empowered and even tempered CEO (who has people skills) to run it to new heights.