Also, it's probably important to note that the GB/FB ratio has remained the same since the update. However, the number of TC/G for OFs has dropped about 8% since the update. That's even after some of those HRs turn into chances to make a play.
I'd say that fly balls are just not going as far as they used to go. A ball hit 340 feet may only go 310 now, turning a HR into a double or an out. 150-ft fly balls are now hit 135, resulting in the 3B catching it rather than the LF.
Edit: TC/G for all positions, though, is down 0.5% since the update. Not sure what to make of that, in light of everything else.