I don't see why anyone would lose faith in Federer, especially this year. If we'd still be in 2013, I could see why, but with his current results, he gives himself a chance to win pretty much all the tournaments he enters. It's obvious that Federer is past is peak, he's lost a bit of power on his strokes and a bit slower on his feet, but that is still good enough to be in the top 5 and to go deep into tournaments. Some might say all he's won this year is a small 500, but he did so beating Djokovic/Berdych and also coming from a set down which is impressive. His performance at the AO was great, just like in IW and MC. Like Nadal said earlier this week, you can't expect himself and even Federer to win every tournament they enter, like everyone else, these guys are human.
2014 could be a great year for Roger. The top guys have never been more beatable this year then they have been in the last 4-5. Federer is now back inside the top 5 which will give him a more favorable draw which adds to his chance at winning a 1000 or a slam.