Funny thing is that even if you think 30 fps is acceptable, you just find yourself missing while shooting much more often. When I started playing Odyssey I was wondering why I was sucking so much at aiming, when I was quite good at it in Call of Duty years ago. Then I turned on the FPS counter and noticed I'm playing at around 30fps ish. I lowered the resolution and suddenly I could shoot much more precisely. So yea, 30 or 60 fps is a huuuge difference.
Lowering the resolution gave you better performance? I've been limited with the amount of time that I've been able to try things out for myself (bloody kids) but from what I've read on here I got the impression that lowering the settings usually does nothing for most people?