Sad to see you go, but there haven't been any changes to the engine for quite a while. The closest I've seen us do is change the way Cups will work starting next season (you'll get opponents of your level, or much, much closer to your level).

I've heard people speculate there were changes to the game engine when we had that infamous server downtime a few months back, but that was an authentication server problem and nothing about how the matches (or anything) in the actual game works has been changed.