What an incredible point it was, one of my favourite 2012 rallies. But, to be honest, I've to say that you are right: this point reflects that the defence of Nadal is incredible and one of the best of the history, but Berdych shooted flat shots that would be winners if the court was faster.
Personally, I find interesting having slow and fast hard courts: we have clay (slow court), grass (fast court, it isn't as fast as before but I think that they have to make it faster because this is the essence of grass). Then, we have hard courts now, wich are the middle point between this two classical surfaces (that are played on the ATP tour less than they should, specially grass... what a shame). So, as a middle point between fast and slow surfaces, I think that hard courts have to be made of different speeds. We can make hard courts with lots of materials, so we can change the speed easily.
But, in general, tennis is slower than before. And I think that it is not positive, as matches are more and more physical and we see exhausted players on tour at the end of the season. It is not beauty to see a player loosing a match because he had an exhausting match on an early round. Injuries now are more common than before (or these are my feelings). We are putting the physical form almost at the same level of the tennis technique and ability, and I think that this is wrong. The rallies are longer and more exciting, but there is magic too in short rallies. They are beauty too. However, my favourite surfaces are slow courts, but I agree that we have to equalize the fast and slow court tournaments (and play more in classical surfaces: clay and grass).