Low scores=No online play.
One reviewer said that he did not get to kill 1 single enemy mech while playing the game.. Definitely not an accurate review and I don't see how that's possible considering I don't know of any missions where you dont shoot anyone..
Another reason for bad reviews is "I played for 2 hours and never got into an online game!" That's simply because the majority of the people who play think they can play in a 6 vs 6 free battle game, which is pointless cuz some will get dropped, then there's always the possibility one person won't ready up and everyone has to wait. 3vs3, and 4vs4 work just fine and you don't have to wait to play.
This game online is amazing. Best online game of the 360 at this point definitely. If you have xbox live this is a must
Pros:
Great squad play, tactics and teamwork play a vital role
Awesome customization, some people have some crazy designs.
the satisfaction of seeing that giant explosion when you kill an enemy.
BIG ROBOTS with BIG WEAPONS.
Great replay value.
The war.
Cons:
Graphics aren't the best, but they also aren't the worst.
Single player.