It's what I call a good 'filler' game. A game that you generally play between big titles like Dragon Age, Mass Effect or Starcraft 2 as in your case.
You'll probably pick it up again once you finish with Starcraft 2 until the next big game is released.
The reason for this is that although War for Cybertron is a fun and well executed game, there isn't much in it that's really new. From a gameplay perspective we have seen it all before several times already.
The appeal is really just the G1 theme and that is only really appealing to fans. To a non fan gamer, it's just another game, nothing special.
That's where the developers failed, they made the gameplay far too generic for it's own good.