You didn't miss anything man, there are a lot of average books that people find enjoyable, it's different books for different people. There are certain books that I Know are avg but I still really like them, I guess this must be one of those books for a lot of people.
Nothings missing. For you this book wasn't that great. That's okay.
I read a lot of fantasy. The Sookie Stackhouse books were supposed to be great. I couldn't even finish the 1st one. On the other hand the Spill Monger series is one of the greatest of all time (IMO of course). But I think most people are like "Meh. It's okay."
Read what you like. Enjoy what you like.