Yeah this is not classic grass court tennis anymore, but Federer's modern grass court game is working incredible well, so there might be some upcoming players in the future with that. 10 finals in 12 years is still a great achievement.
To be fair Djokovic is slightly changing his BH for grass, it sits down incredible good and it is more flat than his shots on clay.
EDIT: And return is so important on grass and his return is really a killer.
I am just watching a pep lay of it and I don't know how you guys can say this. Grass has played like this since the grass type was changed and the grass started to get grown a bit longer. Just watching the replay thought. Djokovic played amazing here this year. If the grass is so slow why is Nadal getting pummelled early every year now ? Changing the grass back would make it even worse as the grass lasts longer now. I see brown patches at the baseline but further in the grass looks fine. Djokovic was hitting a fair few serves at 120 mph and some better than that. You guys just can't accept that he is not declining . Just give him some respect . Same amount of Wimbledon's as Murray and Nadal combined .