Good read Magnum. Here's my tips/observations after 10 hours of MP play:
- In Rush consider having an Assault member with a 320 using Smoke. Certain levels (Paris Metro for sure) are pretty much choked and the only way to claim them as an attacker is to Attack in Force

and provide smoke cover. There are so many RPG's raining down hell that Smoke cover is the only chance. The downside of the 320 Smoke is that you have a medic with no medic bag, but they keep defib.
- The M16A4 and AK's are pretty good in single fire mode (button 'V' on the keyboard) as you get no recoil and decent accuracy. The 4x scope is pretty handy for this, and not too bad up close either. Tap tap tap.
- There are 'In capping buildings' on pretty much each map, i.e. a place where you can go inside and hide while the MCOM timer goes down. As attacker get used to finding them and as a defender use nades pretty much every time you walk by one (and the MCOM counter is moving).
- The Tactical Lights (flashlight) on the M1911 is very very bright, and if I need to reload on primary it's often quicker to switch to it and dazzle people to death.
- You can only really stab properly from behind, so while it's a cool animation you will /FailStab a few times and it's usually worth just double-tapping (just to be friendly!)
- Rush and defenders knowing how to use Mortars is a kill-box party. Switch MCOM if attacker as at the moment they are a little OP'd.
- In conquest if you're doing the 'crazy roadrunner circus' thing of sprinting to each MCOM (AH, I Just Cleaned That!) then consider a perimeter plan where you claim A, B, C but leave D and E. On a public server the other team is rarely organized enough to figure out that they shouldn't be attacking in dribs and drabs and you can get some serious 'defend' kills once you get good position. Hilltop of Caspian Border is a typically good defend stand.
- A decent Helo pilot and gunner can win a round if done right. I never get bothered by Jets but helos are a real pain.