YouTube - Pro Evolution Soccer 2014 (PC) | UEFA Champions League | Chelsea vs Atletico | HD
I enjoy this patch (1.12.) a lot. However, I do think KONAMI should work on keepers AI and them running out and kicking the ball out of bounds when there is absolutely NO need to do so.
Second thing, I tested this on all assist pass support settings, there are times when AI decides that pass will be intercepted no matter what. Be it 5 meter pass or 15 meters one, doesn't matter. You will see AI player intercepting it no matter what (pass will lack power, you will want to pass to some other guy then game algorithm decided, etc.).
It might fall into blantant and visible scripting. It was probably made to keep game more entertaining and keep passing stats under realistic value (NEVER finished with pass acc over 82%). However, passing acc should be decided on stats, not game deciding this stuff on random basis (most visible in final quarter of pitch as can be seen in video

).
Third thing is, I doubt anyone at KONAMI watches football. This is mostly visible when you see players like... Hazard tackling the ball like he is friggin' top class defender. Or you have players like Cleverley intercepting passes like he is Vieira -.-
Way OTT and definitely not realistic imo. Needs a serious look at.
As for difficulty, this patch is not more difficult than 1.07 after getting used to. In fact it can be easier. Mind you I won't play Top Player/Superstar, because I don't really want to get more frustrated. But on PRO AI offers little in attack (unless that is something decided by team tactics :/). I would love for AI to change their approach. The problem is tactical system PES uses. This would need some revamp.
Anyway despite the niggles here and there, the game is again v. playable for me. Goalkeepers are improved vastly and so are the shots

. Zippy feeling is back in players movement too.