It's not lazy, but I think a lot of younger players tend to give at bats away. Younger players are normally less patient and more agressive. That can be a very good trait, and it's clear by the numbers that Hanley has put up that he hasn't been affected by this approach.
Just because he swings early in the count or is a little too agressive on 3-2 pitches doesn't mean a thing. He wants to hit. I can't imagine Hanley ever goes to the plate with a "lazy" approach. He wants to crush the ball. As the years go on, he will get more patient and take what the pitcher gives him. It's the normal growth curve for baseball players. I have no doubt that within a few years Hanley will be a consistent .330 hitter, without losing his power.
As for his defense, I just think he has the problem a lot of tall shortstops have. He tends to come up on the ball or just try to reach out with his arms to get the ball. Guys like Jeter and even A-Rod when he played short, had this problem. Again, I don't think it's less, instead, it's part of maturing as a baseball player. Hanley is just a kid. We just get spoiled by the sick numbers he's put up.