Well, it works fine for Netflix, Amazon, and streaming my MediaCenter and PlayOn DLNA content fine. That covers a fair chunk of the market. The rest of the streaming stuff is just taking up space in my view. I agree, I'd like to be able to remove most of it from the UI .
I think it was said best elsewhere: if streaming is your PRIMARY focus, get a dedicated streaming box like a Roku, or a full-on MediaCenter PC that will do just about everything. If you want a Blu-Ray player that will also stream Netflix or Amazon (or Pandora for music), this works great, as will some other Blu-Ray players, just not necessarily at this price point for quality Blu-Ray playback.
Also note that you can use PlayOn as kind of the back door to a lot of other streaming support.