I hear ya on the K/D ratio. Mine's about 0.57. My reaction time has slowed too but what gets me killed more often than not is tracking an opponent's movement when they're shooting at me. It sucks to get off the first couple of shots only to wind up dead in the end.
For pete's sake, keep me out of vehicles! My flying is usually dreadful. Crash is my middle name. And I sometimes get stuck simply walking through a patch of trees in an AT-ST. It's hilarious.
I changed my focus from general firefights to completing objectives, especially in Walker Assault. I practically never get the most points scored accomplishment but I've racked up a quite a few MVPs in the last month or so (self-boasting
).