What I did like:

More of the previous game. Slightly less-engaging story, but Miles is a very likeable protagonist and who doesn't love the new black suits.
The new abilities are great to use and the stealth system is still fun.

What I didn't like:

Even though there were new abilities, the skill tree didn't enhance the gameplay as much as the previous one did.
The story is a lot shorter. You need to play the game twice to get Platinum, so it's almost as if it's throwing that short length in your face.