This. Beckerman is the one who had the best understanding of the money flow, and likely the 'spend to the cap' allowance flowed right through him, or even from him. I doubt he'll penny pinch just because he's a finance guy.
Not necessarily. TL could have said that it was mutual to not make AEG look bad, or maybe AEG needed to release him from his contract, which if they did, would have made it a mutual agreement.
Saying it was 'mutually agreed' is just the business world's way of saying people parted on good terms. I've seen that written in press releases thousands of times when I was a reporter, and several times there was far more to the story. Usually neither side wanted to get bombarded with questions about what really happened, so they just said it was mutually agreed and left it at that.