Dismissive, absolutist and defeatist, as usual. Your second paragraph really gets my goat. As if you or I could even have a clue exactly what Federer had to deal with recently beyond a vague injury account. There really is no 'should' about it at this point. Back problems can be SO sh*t. A tempered serve, more conservative motions and extensions, all seem like natural results. Of course he would want his form to increase before Wimbledon, that's pretty much why he's playing. I think Nadal's dishonest comebacks after sabbaticals over the years have made people forget how tough it can be. If anything it's GREAT that he's playing at the moment, lest we forget about less fortunate players like Hewitt, Safin etc.. Oh and the 34.8 years of age and 1313 matches might have something to do with it, or are you going to dismiss those as well? Remember, these aren't just excuses, they are genuine contributing factors to a player's decline. I don't even think your glass has any fluid in it at all, quite frankly.
It is disappointing that we can add yet another match to the list where Fed won more points and had MP but lost and I understand that that is frustrating ('what could have been'), but I can't help but look at what Roger has actually achieved and smile. Throw as many knocks against him as you like that is still the end result. Roger's so good he can lose more matches that he statistically should have won than any other player in history and still win the most. If those two qualities are intertwined, so be it.
I suppose it's always more difficult to stomach when there are other all time greats breathing down the necks of his records.