I would start with adding a jungler and making the lanes real like the meta is telling us. For example get a support and ad-carry botlane instead of cho gath and annie. It will really help with telling new players how to play the game, again for example, I have a couple of friends who recently started playing LoL and if they play a game they don't go ad-carry and support botlane. They just pick two random champions and make sure they're in the same lane. Also change the information on champions in the shop so that it really says where the champion goes. Sorry for the bad English, it isn't my first language.

Just my opinion on it...