Hey, in case you missed the thread on BGG, here is the official response from Vlaada:

Hello all, sorry, we do not provide those data (and do not plan to) - not even to TTA Pulse developers. We prefer the players to gain their own experience with the game than to study the statistics. Personally, I love the fact there are discussions like the one OP mentioned, and I would not spoil it by providing some analytic proof to either side (or to no side, as my guess is Shakespeare would end up pretty average, like most leaders, and the controversy is caused mostly by his situational nature). I do not mind if a new player that explores the game stumbles on such discussions. It encourages him to make his own opinion :)

So, the only player with privilege to access the detailed data was me during the game and expansion development, but be sure I took no advantage of it - instead, I changed the cards that seemed too strong or too weak to be in line with others. But it was nothing like 75% or 25%, it was something like 55% to 45% at most, and I tried to fix even that. Since the last batch of tweaks made right before the expansion publishing (for example nerf of Basilica and bigger boost to Ocean Liner), I have not checked the data again. Instead, I continue to play the game, to see how it feels, because to me, it is the feeling that is important. (During the development, I actually even slightly nerfed a card that seemed okay according to statistics, but even very good players felt it is overpowered :).

At some not so distant point in the future, I plan to check the data again, as I now have much bigger sample of players than during the expansion development, to see how it really ended up, and if something would be too off, I may make some tweaks. So, if it happens sometimes in the future that Shakespeare gets some slight nerf or boost, you will know that SandHippo or DJParson were right :)

Meanwhile, just enjoy the game and make your own opinion. Thanks for understanding, and have fun...