This is a great start, and I for one will start making sure people I know know about this website!
Samir has a good point, but I think that the ordering is fine the way it is. I agree that it is more of a hassle to navigate to find whatever hero I am looking for because it is in a different format than the LoL website, but ultimately alphabetical arrangement is the most efficient way to do it. In a few weeks or months when the LoL champions site becomes relatively obsolete, the alphabetical arrangement will seem more natural.
The biggest thing I would worry about is the arrangement for the published guides. Right now it is fine since there are only 3, but if eventually there are 100 or so, how will they be arranged? Are they going to be searchable based on title? Will they be categorized by hero? Will they just be listed alphabetically based on the first letter of the first word of the title? Or by time submitted? Since the guides are basically going to be the focus of the site, this will probably be the most important aspect.
Anyways though, awesome start. Keep it up!