To my knowledge, there is no way to get the Superbooster and it's features don't appear to be functioning in game at the moment. So the request is valid.
I believe the dynamic shadows were added with Going Rogue which came out in August of 2010. So I think we only had it for about two years. It's easy to forget it was important. But yeah, if you usually kept your graphics quality low, there was a good chance you never noticed it then.
In the game you're able to customize what channels are in what tabs. You can even add tabs to your chat. So, you can just put global friends and friends channel together in one tab.
I have yet to run into any nastiness. That isn't to say that there won't ever be but for the most part I'm pretty proud of my server peers. There may be some friendly swearing here or there, but mostly in good fun rather than in genuine foul use. I try to keep my stuff clean and help out. With great power and all that...
I recently had to start all over but not as an alt. I'd made some really silly mistakes and overused my free respecs. But it's okay! I got some nice IOs out of the deal.