A Breeding Ground for Feeders.
I have played five Twisted Treeline matches and every single time my team is full of feeders (I think you know what those are, people who "feed" their enemies free kills?). I would just count this off as coincidence and seldom play this map again, but the enemy team is full of feeders too! The most common trait of these summoners is to try and sneak past towers with no ally minions in the range. I think, to lower the amount of inexperienced summoners, the best way to solve this problem is to add a function that counts how many times a champion has been executed and- after a certain amount of executions- suggest them to retry the tutorial. Although there are still some experienced summoners in the Twisted Treeline, most often I encounter, well, feeders.