I likethe advanced monsters mainly because they give them some colour and shape, rather then just a monster. They can help when makingb ideas and plots and how to advance stuff too. I don't see the point of reading PC PrC examples, as I'm not going to do whats done in the book, If I like the character of them I might play them (as a GM) in the game, but usually, unless well done, the amount of flavour isn't enough to catch my eye. I don't think I'd ever want to show an NPC with a PrC for the sake of the PrC.
The idea of the web enhancments is nice, maybe a lot of flavour could be added to them, with the main purpose of them being run in the game.