Man, I'm so unbelievably bad at close range encounters. I miss every shot and mostly the enemy somehow seems to know where I'm moving/going/shooting at any time. Not sure how to improve on that because there's not much room for practising. I see someone near me, shoot him five or six times without killing him. He may even get the chance to reload the weapon while I'm going into defense mode and run for cover. That's a typical close range battle for me, haha.
Sounds cliche but dropping school/military exclusively really does help. If you're not getting down fast enough then focus on your chuting and make sure you're getting the best drops possible. After about a week or so of practice I went from scrambling to even get one pickoff to being able to clean out school with just a shotty or an uzi if thats the only drop I find.