Wow, thanks for the all the feedback everyone. XD
The team dynamic is something I’ve known I need to work on for a while, but haven’t made much progress. I usually play solo as I don’t have any RL friends who play, and 99% of the people in my groups don’t have mics. I need to work on meeting some people online, but my schedule is highly random, and on top of that, I’m not the most social sort in RL. 
Souljah: Yeah, I’m all about staying in cover. I also tend to stay out of the middle of maps (Swordbase’s ground floor, Pinnacle’s dish, Asylum’s ring etc.) when I can, because I find they tend to be killzones filled with bullets and grenades.
Shanez: Thanks. It’s hard not to feel noobish when some peeps are running around with 3+ K/Ds. 
Reverence: Thanks for the info about spamming in Vanilla. I was under the impression that pacing was effective in Vanilla, but moreso in TU. I generally play Team Slayer and was getting out-DMRed more often than I liked. Maybe I’ll hop over to Super Slayer.
Ciaran: I’ve experimented with armor abilities a bit, and am still working on it. I usually run AL (yeah, I’m one of those guys) in team games, as it makes a decent CQB weapon/anti-grenade system, and occasionally it’ll allow for a teammate to happen by and clean up an enemy that outplayed me. I use Sprint a good bit as well, and have had some limited success with Hologram. The rest I’m still practicing with - I don’t seem to be crafty enough to use Camo properly, and Jetpack seems to make me a highly visible target. 
Fatman: Right on, I also do a lot of practicing in Firefight. General aim/track to target time, sniping, no scoping, controller sensitivity testing, the works. I tend to use the offline flavor as it allows me control over what weapons I’m using and what enemies I face - I have a couple games that are nothing but Elites to simulate MM’s shielded enemies.
SensoryFour: Good advice. I tend to do just what you said, and I have to keep reminding myself to have fun along the way.
Splitwarrior: Yeah, I try to stay relaxed as much as possible when gaming. Probably my biggest issue is that when I’m running around the map I’m fine, but when I come upon an enemy or situation where I need to do something, I have a tendency to tense up and freeze in the heat of the moment. I’ve gotten past it somewhat, but I find it helps to stay comfortable when playing.
Theo: Yeah, I’ve had some success with crouching around corners, usually with a shotty or sword. Still working on integrating Camo tho.
Miss Cannibal: Glad you mentioned hanging back. I do try to support my teammates as much as possible, but I find most of them tend to run face first towards the nearest firefight, guns blazing, and usually end up dead. I tend to either hang back and provide cover fire, snipe, or run around and try to attack from the flank while the enemy’s occupied. I seem to have more success with it.