Ummmm..... Five Magic Systems? Pretty Sure Not. In fact, I recall one, maybe two, and both very well explained. Sure, we may not understand exactly how/why everything works the way it does, but we understand enough for the books to make sense, and for us to be able to see how the magic could be used. It also lets us have that, "Oh, so that's how he's going to do it," moment when something epically awesome happens. None of the magic systems are clear cut, and they're all complex (like huge), but they are well explained, and they do make sense.
But even if there were 5 magic systems, does that really matter? I've never seen this series described without the words epic or huge scale attached to it. And magic, if used right, can really add to a world. The more systems, the more opportunities to change your setting into something unique.
What are you still confused about? Plot? Magic systems? All of the above? None of the above? I'll do my best to help clear up your confusion if you would like.
I never had much of an issue with overabundance of words, though I can see how others might. It's the same as with Jordan. I personally felt it was great, but I have lots of friends who think it's too long and long-winded.