After getting my first game to year 2015, where regens are becoming a big part of the game, I noticed the "good" regens often share the same set of skills, as if there were several templates for them, which determine a big chunk of their characteristics. The most blatant pattern are the set pieces. With the starting player base it is often hard to find a good player to perform them, but with regens it's easier than ever! And they usually have all of them high at the same time - corners, free kicks, penalties. Hordes of "Nakamuras" are invading my league.
To check up on this, I went through a bunch of countries where only regens are "born" in my game (Croatia, Nigeria, Morocco, etc.). Scouring through the leagues there only confirmed my concerns. Offensive players are much too similar. Aside from set pieces, they usually have high technique, crossing, and off the ball. Here's an example. The one on the left is a midfielder, the other is a striker (thus higher finishing). There are loads of other players like of them.
While I understand that central defenders must have high marking, tackling and heading, I think the midfield and offensive players should be more random and varied.