We need a more in-depth item tutorial.
What we have now-- "the enemy is AD so buy Thornmail first item on Ashe." Isn't even remotely close to a real game, even against beginner bots. We need an in-depth tutorial on which items to buy in which situations so new players-- who for the past two years are getting to level 30 twice as fast with even less experience-- can get some knowledge of how to build against the enemy team instead of rushing a set-in-stone "meta" build for the champion.
Sure, if a build is drastically overpowered to the point that it doesn't even matter who you're playing against, that works. It's also a sign of drastic imbalance. But when that isn't the case, it's important to be able to read which items you need for the situation.
A better item tutorial, even just as much as having certain situations presented and which items to buy in that situation (Grievous Wounds items against a Warwick bot, Maw of Malmortius/Banshee's against an Annie bot, Zhonya's against a Zed bot), would greatly improve the experience for new players and their friends who are trying to teach them the game. It would also increase the speed at which new players will legitimately be ready to play with other human players.