Charteau had at least one big stage. He took almost maximum points from stage 9, for goodness sakes.
The problem is, major level climbers feel like they should be GC threats, especially with so little TT distance. A lot of the time recently the GPM has gone to a climber who feels like they have to go on long mountain raids because their GC bid will be derailed by TT mileage (Rasmussen), breakout stars, especially from wildcard teams, who aren't sure of their GC capabilities so look at the GPM as a way of selling themselves (Soler, possibly Kohl, though he rather fell into it after the Saunier Duval withdrawal), and GC riders who had lost enough time that they were no longer a threat, trying to rescue their race (Pellizotti).
Last year, the lack of time bonuses meant GC riders weren't bothered about winning the stages, and a collection of French riders (Pineau, Casar, Moreau, Fedrigo, Charteau) were the most active breakaway riders, and several of those are good enough climbers to duke out the 1st category and HC climbs.
I'm not going to begrudge Anthony Charteau his win. You can only win against the system in place, and he rode fabulously to keep that jersey. Casar, Moreau and Fedrigo are no mugs uphill. A weak GPM competition might just have to be the price we pay for a strong GC competition because few contenders are truly eliminated from contention. Maybe if he'd been on any other team Chris Horner could have got it; Caisse d'Epargne nearly did get it.