This game rocks.
For one, I'm very pleased with the new refs, they were a real gripe for me, as i'm sure they were for almost everyone, in PES5, finally they have been sorted. And they actually give red cards now, about time.
The variations in the weather now are great, I was getting sick of playing ML in perfect sunny conditions year round, don't think I had one snowy ML game with PES5.
Finally defending has become an actual skill that we need to learn, not just relying on

to do all the work for us, despite the changes in 5, I find

works well to close off an attackers route to goal.
Keepers are more unpredictable, which I like, some might not but I do, and I've seen some awesome saves, great new animations.
World Cup mode is awesome along with the new licenses, I love the way we can change the Qualifying teams and groups before the tourney starts.
Lastly, the amazing patches that some of our editors have created make the game so much better, I cannot express how thankful I am to all you talented, hard working guys.
There's probably gonna be loads more things I find that i love, these are just the early impressions.