I can't understand what you guys are talking about. The problem is:
They're using the Reach Engine for multiplayer.
That's a problem because the Reach Engine sucks.
If you say that either of these statements are false, explain your reasoning. Since the first one's a fact, I'll skip to the second in a preemptive argument. The Reach engine is terrible because its just a dumb luck combat situation. Bloom is ultra lame, but more or less controllable. The only problem is that I eventually lose to johnny call o duty because hes shooting much faster than I am, and that's not acceptable.
Next, armor abilities ruined just about everything. If you are killing a guy and he armor locks, you better hope to god that one of his many team mates isn't anywhere in the area because you're screwed. Or maybe he'll just stick you close range and then armor lock into safe mode. An ability whose only counter is the same ability isn't balanced and therefore isn't acceptable.
The melee system is terrible, too. It promotes double beatdowns and tying, but I guess that's not a problem because everyone likes tying (sarcasm).
If you have issue with anything else besides what I've addressed in this post please say so.