Considering there is a bunch of guys from europe in the NBA, you expect alot of them to be good. That isn't the case, trust me when I say I am not trying to offend anyone from Europe, but they play a different style of basketball over there and not everyone can transfer to a great player over here. Everyone who drafts a european big is going after the next Dirk or big Z. It's a risk that alot of teams take and sometimes it pays off. But more than anything there are alot of failed players from Europe who come to the NBA. In my eyes it's a dream alot of players want to achieve but is it really a smart move to help foward there careers?
Guys like Zaza pachulia, Dan Gadzuric, Sarunas Jacikevicus, Marko Jaric, Thabo Sefolosha, Darko Milicic, Andrea Bargnani, Johan Petro, Jose Garbajosa. There's probably many more, but these kind of players probably would've been better staying in Europe. Not all of them have had a chance to play but I don't see any of them fitting in a good NBA system. Alot of them have been labeled bust. You may add danilo gallinari to this list as well.
Obviously not ever player is bad like Jose Calderon,Tony Parker, Pau Gasol, Dirk Nowitzki, Zydrunas Igalskus, and there are probably some older players that were good to.
My point is that I think alot of international players can't make the transition to the NBA style of play, and I think a team taking a risk on a euroballer isn't something that should be done as often as it is.