I finally took the time, installed the game and played about 10 games.
First thing you notice is the game interface. It looks like is made for advertising and social media not a mech game interface. If there weren't mechs around you couldn't tell this game is related to MW4.
At first you get 4 mechs you can't configure. This are "training" mechs except this game has no training to speak of, you're thrown into matches with full upgraded mechs. I has 2 games where the entire team was killed without even seen who shot us. Great training!
All over the internet you find this nice gameplay videos from MWO, all in daylight all full of cool moves. In reality 2/3 of the game I had were at night where you stumble around using somekind of blury nightvision/infrared were you can see only blue and red spots until somebody shoots you with a laser and all you see is a red screen.
Moving around is almost impossible because you can't see building with that infrared only mechs, and if you want to see the building you can't see the mechs. Without a 3rd person view moving around buildings is almost impossible. You can't see what way you're going and you always have to look at the hud to see the small arrow that shows the direction of legs.
Then I got a "non-training" mech. The configuration for the loadout is so bad it doesn't even come close to MW4.
Bottom line.....awfull game, horrible gameplay, it's not even worth for free.