Nadal could play on ice courts as well. It doesn't make it right that they made this change at this point to suit Federer and big servers. I'm not too sure about the balls changing so much each year. This year was way faster though.
It isn't even clear that you've proven that they changed it on purpose.
I do agree that the court seemed faster this year, for sure.
But the weather was quite extreme this year, so you can't just conclude that the changes were because of purposeful things the tournament directors did.
IF it was done on-purpose, that would, imo, be fair play since Wimbledon was slowed down for many years. But I think that Wimbledon is supposed to be faster this year; hopefully, the FO will be slower next year, if it was due to their control.
I think someone proposed having more tournaments on clay and grass. I wouldn't be opposed to that. I think it should be 1/3rd HC, 1/3rd grass, 1/3rd clay. Although I can see the injury argument for getting rid of HC altogether. In any event, clay can be made to play fast; and "real" clay, not crushed brick, is a lot different from Roland Garros; for starters, on a true clay-court, there is no sliding.
Imo, if HC was ever done away with, a good setup would be:
AO: grass like the current Wimbledon: medium bouncing and medium paced
FO: slow, high-bouncing clay with crushed brick on top
Wimbledon: traditional fast low-bouncing
USO: true clay without a layer of crushed brick, medium bounce, medium-fast paced; because there'd be no crushed brick, there'd be no sliding.
PS: Supporting my suspicion that the weather was the main factor, I think you can compare the days leading up to he final and the final. At the men's final, the clay seemed to be playing not as fast as it was all week.