I have seen five or six sets from Federer in this tournament, plus the obvious highlights. With a cooler head, I guess I can give an "A-" grade for his performance. In the end, he won it, was broken only three times the entire tournament, and managed to beat players playing real good tennis. The grass was not particularly fast -- I don't think it was much different from Wimbledon, which is good (in a warm up sense). Those are the facts on the ground.
Now, the bad parts: He was not able to sustain a good level of play in most of his matches. On the plus side, he did not panic, an actually was able to keep the score close even when he was playing quite bad. He raised his level when he needed to and the guy on the other side of the net could not do the same (or even keep his), which is fine.
His serve was good enough -- being broken three times in five matches is not a bad number. First serve seemed to desert him at times, but the old clutch serve to get out of jail was still there. Second serve is ok, but his "safe" kick serve to the opponents back hand was not working that well, specially on the add court. He adjusted that to some extent on the final match.
RoS is strangest thing in the universe -- and it must be madding to play against him. At some stretches, he returns like sh!t, the guy on the other side could use lazy underarm serves and he still would miss the return. The odd thing is that he misses a good deal of them just trying to put the ball back in court. Then all of a sudden he connects some absurd returns, plays a perfect return game, and breaks. On this particular tournament, though, the "bad" stretches returning serve seemed to last forever.
Net game is still head and shoulders above the rest of the field. He does on aggressive charges what other players do on opportunistic approaches. At times it seems that he charges just to much, but the numbers show it is paying off. Besides, it puts a lot of pressure on the adversary and induces a lot of errors.
Translating this to Wimbledon, it is easy to see him stumble. However, when playing well, I don't see anyone not even close (on grass at the moment). The problem is that he cannot keep the high level for much more than a set. I think he needs a good draw in Wimbledon to have a chance, and by "good" and don't mean "easy". I think the best thing that could happen to him is to be tested at R3 or R4, and of course, manage to stay as little as possible in court. In other words, he can still beat anyone on grass -- but it seems the opposite is also true.