A recent example for me is Godfather II. I still enjoyed it, but it missed the mark on several factors that made the first so great. Mostly is the fact that the first one had large, sprawling boroughs of NYC with tons of shops to exploit and rackets to lock down. This one just felt like 3 small neighborhoods, with the focus on the strategy elements. It just wasn't as epic as opening up a new area, and having tons of shops for you to go around and extort.

But possibly the most disappointing aspect is something inherent to "next-gen" sequels of pre-existing IP's. The framerate just isn't as smooth. Seeing developers struggle to have that "hi-res" feel only to have the framerate suffer is really discouraging to me. I loved the shooting system in GFI, popping into cover, unloading a couple shots, switching weapons really fast and knocking out tons of guys with well placed headshots from a machine gun. It still had those elements, it just didn't feel as fast, smooth, and most importantly, satisfying.