It's what it's best for. I can't imagine the sheer terror of seeing my Titan's health bar get eaten that fast.
Yeah, the moment you get caught out in the open by a Pilot, you're dead. The LMG's terrible for anything but killing titans and mid-range combat.
Switched back to my CAR, and maybe I haven't lost my edge after all. CAR + Radar Pulse (or whatever it's called) is awesome.
On the whole, the game is pretty good at avoiding the "bullshit death"-thing that got me so tired of post-Reach Halo multiplayer, but it has its moments. This one guy with a Smart Pistol I'm chasing cloaks and hides behind a wall, and when I spot him I start shooting him. I don't give him time to lock on, so he just cheeses me with a jump kick while I'm pumping him full of bullets. The melee feels so cheap in this game, especially when you're used to something like Halo where only an assassination is a one hit kill. Getting your neck snapped when someone gets the drop on you is fine. Getting killed by someone's foot while you're perforating the rest of his body, less so.
I'd say that and the shotty are my main two problems with the game.