This really sucks. I played this game for 5+ years. In fact, I just returned to it last weekend after about a year away. It is still my favorite MMO. It is very group friendly and doesn't have all of the gear/loot grind that I hate in other games. I was on last night and everyone was talking about the cancellation and how they let us know. I am sad for the players, but even more so for the employees that lost their jobs.
I have found that I usually suck at MP. It seems that I have a large glowing light surrounding me that everyone can see from anywhere on the map. I have found though that if I think someone will kill me in melee, dropping a grenade at my feet before I die is usually a nice repayment. Especially with Master Crafted Wargear(I think that is what it is called) equipped.
Even though I get killed all the time, I find myself really liking the MP. I have also finished the campaign(on easy) and that was a lot of fun as well.