There is an "Events" icon on the map in the city, social area, but no npc to be found, I have checked thoroughly. There is floating foliage and rocks in the coast area on the beach next to the cliff with the building on top of it. There are a lot of damage received and damage given issues in the multiplayer. I have been shot around corners by assault rifles and sniper rifles. Titans with high armor rating become bullet sponges in multiplayer unless you use a super to kill them. Even a pike vehicle won't kill a Titan with high armor rating, For example, I shot an entire clip, 44 bullets, from my assault rifle into a titan running straight towards me and it took about half of the Titan's shield away. Shotguns either kill in one shot or they take out the shield, at close range, and aiming down sights seems to do less damage, unless that's all caused by the damage taken and damage received issues. One last thing for multiplayer, sometimes damage isn't taken by enemy players but, after they killed me the damage was applied to them.
I agree, I use solely a shotgun now because there are too many titans that are tanky to the point of where primary weapons are useless, and their special attack is over power, I've never been able to damage them during their ground slam, with a shotgun or a throwing knife to the head, the AoE is to massive to avoid, and it seems that they're distance to you is irreverent and they can be right on top of you instantly. Where as all a hunter has is a gun that instant kills but can miss and doesn't give any defense buffs, I don't know what warlocks have but I've never been killed with it so its safe to say unless I'm missing something Titan class needs to be more balanced.