Do not forget the latest part, Ghost recon Future Soldier. It has "cloaking" for the soldiers. Sadly, I have played Ghost Recon since it first came out. Phenomenal game until the last few releases.
COD has to go vertical or it will surely die. It gives the player so many more ways to play. This is what makes Titanfall and Uncharted so much fun to play
Hrrm Exosuits aren't unique to CoD:AW I remember the days of running around in an exosuit in Alien Versus Predator 2000 and Bet On Soldier, CoD is partially ripping some things from Titanfall but not enough for copyright infringement and as KingKat said it jsut goes to show the CoD developers see Respawn as a threat and decided to make thier little "spin" on it.
I wonder if a company could sue another gaming company for making a similar game or stealing ideas...
Not true, in my opinion. Titanfall has wall climbing, flying, cloaking, titans, different guns, and you either evacuate to a helicopter if you lose or destroy the helicopter so the enemies don't escape. So in my opinion, Titanfall has more content.
What you are listing is "different" content, not more. Comon man, lets try and be objective, the degree of content in Titanfall vs COD is not even close, and I hate COD. For example, COD has at least a couple of dozen weapons and many items/upgrades for each weapons. TitanFall has around 12 weapons with about 2 components per weapon. Do you really need me to continue? And the hole evacuation thing is a cheezy way to end a match; means absolutely nothing to the game or the match. TitanFall is almost identical to the beta/demo, which is why so many have already maxed out their levels and have moved on to something else.