You get sooo much new stuff and sooo little new game(play), still every new GTA game is hyped like it's the second coming.
All GTA games have been top notch, including the mission packs. Boy you picked a wrong game as an example.
I'd say current trend seems to be FPS-games on consoles.. and the pad ain't meant for it pretty much ruining the games. Sacrifices had to be made for favor of player having crappy controls.. usually cpu-opponents have slow reaction times and have very low aimingskills.