It is good to see AC doing well. Better than the alternative of them being in a financial mess.
As canadiancow points out their alienation of frequent fliers won't start to be seen in earnest until next year at least when people start to realize what is happening. I was talking to a MM co-worker and he didn't have any idea of many of the changes for example, and almost couldn't believe them until he went back and read the emails from AC that he hadn't paid attention to.
But maybe AC will still be able to do well regardless - maybe they have enough people with no choice or maybe they can make it up with VBITs flying Tango. Time will tell.
Airline stocks are still for suckers though. Historical patterns for the last 10 or 15 years tell you all you need to know about that.