You have your grass density turned all the way down.
Turn that stuff to the max, yo! That's the best looking grass I've ever seen in a videogame.
And yeah, I see what you're saying about the cluster of online players. I was in the Temple of Dailuk tonight w/ a group of 8 and gameplay slowed to a crawl around 20-25fps and was really annoying.
I hope they can fix this crap soon. They had some trouble w/ the servers tonight, I think. There was a period of 30 minutes or so tonight when I couldn't log on.
Something else that's aggravating? Logging into my game tonight and my character's a completely different one from what I've been playing with. Appearance has changed. It's happened to me once or twice before.
Every day is an adventure with this one.