I think that's more than fair...
How can it be more than fair?
If it's more than fair it's unfair to someone, surely...
More than happy - it never means genuinely happy, joyful, blissful does it - it means the opposite, it means I wouldn't be happy at all but I wouldn't say so... grudgingly happy. I'd be more than happy to give up my seat if someone asked me to but I can't read minds and don't know who needs it - no you wouldn't be "more than happy" otherwise you wouldn't have sat down in the first place...
There's something parsimonious about people who use the phrase "more than" as a qualifier in this way.
Any other phrases like this?