I'm not sure that clutches are the problem for EU. From what I've seen of the matches and streams (from both NA and EU players) is that EU lets util do all the work of entrying or taking space while NA follows up better with a combo of util and the entry fragger. Also, teams like gambit always leave it to the last possible second to explode onto site and plant with 4 seconds left and set up a sloppy post-plant (which somehow works, idk gambit does look like a cracked team). I feel that the aggressive playstyle that NA has counters the more passive EU playstyle right now.