I went to a dragon raid earlier tonight, and said "ok" to optimization effects. I've rafted a few times since then and it seems like my aim rate with ranged attack is noticeable higher (to where I can shot of god almost every mob with normal range) and crash shot seems to tick up a little faster. I've read on Nation that the true aim rate of the server versus what's shown on the client is lower, so perhaps (just guessing) checking on mini effects decreases the server-client connection time lapse.
I haven't played on my human archer in a long time, so I don't recall if there are the smoke trails of arrows that elves have. Those smoke trails being gone now might be smoothing everything out.
Regardless, I seem to be hitting a lot more with this setting.