Unskippable cutscenes in 2015, other cutscenes you need to button through in order to get to the gameplay, more limited player choices in Hotline Miami 2 than in the original (have to play certain stages with certain characters). Just seems more bloated than the original, which was lean like Finn Balor.
I canceled my preorder because I knew something wasn't right about the game. The original didn't really need a sequel because it was so perfect. I'll probably get HL2 later down the road but meh...
I'm more hyped for the soundtrack than the actual game.