As a Star Wars junkie myself, I am just not that impressed with the story so far, either. I'm not as engaged as I would like. I think I'm going to move on though to my allotted high-end characters and see if the end-game gets any better.
I've fallen through a map once, but just the once. Everyone is right in saying that it "seems" polished. If you only have a weekend to try things out, that's certainly a valid opinion. You guys were also on a different server from the rest of us. Hopefully you weekenders were TESTING though, and not just playing.
Let me just put it this way: our chat is filled with things like "they better start fixing some of these things or launch will be a disaster". It's a bunch of little things, but it's all game mechanics. I wish I could go into things, to help people understand a little better where I'm coming from, but there are a lot of crucial things broken/not working/missing still. They have over two months, but people are getting really worried the more they play, because we end up finding so much more stuff that isn't right.