Personally, I'm playing a lot of matches vs Nadal users and it seems that Nadal is very overpowered.
He has:
-insane defensive skills (speed, counter, stamina);
-insane top spin;
-excellent trick shots (drop, lob, ecc.);
-excellent wings;
-excellent offensive abilities (due to the top spin unbalancing and remember that he has 90 fh power...);
-very good net play (try to play at net with him... considering speed and his good height);
-very good serve (considering also that he can efficiently slice on right handed backhands...).
I'm not saying this because I lost some matches vs Nadal users in exhibition or official matches (I have lost vs Alexjasmins and Clog if I remember well), but because, even winning vs Nadal users, it seems very strongly that they are playing much better than they actually can do. Sometimes I feel like they are playing good just because they use Nadal. When I play vs him, he doesn't do anything special, he just hits high top spins and runs side to side from behind the baseline, waiting for a UE or for a winner opportunity and draining your stamina.
It's impossible to make good dropshots because of his speed and his high top spins. If I make him coming to net with short slices he will efficiently cover the net and do great volleys. If I play offensively and often go to the net, he will reach most of my volleys and my volleying is very difficult because of his top spin and his very easy lobbing. I think there's no way to beat a Nadal user, unless you have the double of his skill.
I win 6-4 vs some players who I usually beat 6-0 when they're not using Nadal, I loose more or less close matches vs players I can beat if they are not using Nadal. And what about players actually able to beat me without using Nadal? They can easily beat me 6-0, while I can have very close matches when they're not using Nadal.
I think that Nadal is totally unbalancing the game and making him less interesting. I'm not a newbie on this game and I was maybe the first player who used top spin as a weapon (I played with Gasquet in summer 2012), when the game was different and there were no problems about overpowered reaching abilities and speeds.
I'm not making a crusade against Nadal and/or Nadal's users. I'm just afraid that in a few weeks most of players will choose Nadal and the remaining ones will keep tier 1 character because they just can't beat Nadal without a very good player. Honestly, I was using Wawrinka in the last matches, but I have to change my pro to Federer because Wawrinka isn't just good enough to counter Nadal users.
Someone, seeing my good defensive play and my frustration, said "just switch to Nadal", but is this the real solution?
Sorry for the long post.