I wouldn't be so sure. I think and suspect that results of last three seasons came as a surprise to more people, than just to Schumacher, and had he known ahead what's awaiting for him, I am very much in doubt he would have come out from retirement. But, as you suggest, that's history now and there is no point dwelling on it, yet the nagging feeling that the team's management overpromised and underdelivered remains, and it is not going away.
There was a lot of hope and promise, yes. After all, the team had just won the constructors and driver's championships. The Brawn cars were thought to have fallen off towards the end of 2009 because of funding to drive car development. With Daimler taking over, the financial part seemed OK. It would be understandable that Michael and Brawn would have expected more than what came over the next three years. The promises made were reasonable and credible. This is why Schumacher bought into it. Now that things haven't gone the way both Michael and MGP hoped, this is simply tough on both sides. There's a lot of sorry guys on both sides within Brackley, I'm quite sure. Why the need for a public display of apology under such circumstances? I can understand that expectation, but I don't agree with the necessity for it at a public level. Anyway, it's not too late for us to yet see it anyway. Time will tell.
Buttons comments are very well taken too. Hamilton simply cannot afford to give them any consideration:
"I think it is first year with a new team, and it is always a little bit tricky," he said. "It is a new experience for Lewis and I am sure he is excited about it, but I really don't know.
"He is as quick as they come but sometimes it is not that easy to win grands prix and to build a team around you and help a team achieve good results."
Good luck to Hamilton at Mercedes. He'll surely need it. It's kind of like Rossi who joined Ducati feeling that he could guide them to competitiveness. No such thing happened and after three years he and Ducati have failed to make any competitive progress relative to the opposition. This has been despite an engine change from 800-1000cc and Ducati being a works team. This provided fertile ground for Stoner to pick at Rossi. The same may well go for Hamilton and it could well be the case that Rosberg beats him as well. No one is expecting this, but after seeing what happened between him and Button, I'd not at all be surprised if Rosberg manages to fluster him big time.
Anyway, this is about Schumi.