I spent some time yesterday trying to mute the colours in the transporter room, but it still looks rather cartoonish. Also tried some bumpmapping on the wall textures to make them a little more realistic, but I don't think it's worked too well.
Yeah the bridge was incredibly awkward, but I kinda wanted to get in at the deep end. I'm probably about 60/70% done with it, it's the little details that take the longest I find.
As far as the main bridge goes, I'm pretty much disregarding Seasons 1 and 2 and having a look at anything from the last 5 seasons, there are minor changes each season, but from 3 onwards, there's nothing dramatic.
I started the Battle Bridge yesterday, turned out to be a lot more difficult than I expected, here's a very VERY early pic, you can barely even tell it's the battle bridge at the moment -