Great game and one of the funnest I've ever played. However, this is also one of the most frustrating games I have ever played due to the vast amounts of bugs, glitches, game crashing issues, etc. The list goes on and on. It is rare to experience ONE game without there being issues.
Secondly, the lack of story. Yes, it is an amazing multiplayer experience, but there is definitely a lack of fulfillment when completing "missions" when there is literally no story-mode or a reason to liberate a world. For me, there needs to be some sort of drive as to "why" I am doing this besides just unlocking weapons, armor, stratagems, etc. If the devs put even some sort of story mode or some cutscenes to help break up the constant action, this game would have been absolutely phenomenal.