Bungie's own fault for people expecting more from it. They created the hype, they made the promises and broke them upon delivery (open world anyone?) More content was definitely needed (and still is, something free would be nice), the rewards system needs tweaking and their testing can be way better (glitches & cheeses). Other than that the mechanics are rock solid and one of the few games you can enjoy with friends quite easily without conversations being lost in the heat of the battle.