I finally got promoted in my career. Eagerly look up my new options for career tasks, and failed the first task I attempted – instant demotion. Back to the Inn to perform one of the old tasks and got promoted again. Lather, rinse, repeat.
Sounds familiar? At least I have heard it from a few other players.
I suggest to change the system to implement high watermark/low watermarks for career ranks. A promotion requires the current experience, but you would only get demoted if you go below 95% of the required experience for a given rank.
In my opinion this would still be a realistic career experience, while slightly improving player experience.