An improvement for the new player experience: CSing
We all know that CSing is one of the hardest skills in LoL to learn, and new players often struggle with it. Even experienced players miss a minion or two at times.
All of you remember the tower range/aggro ring in bot games, right? The thing that tells you when you need to watch out for tower aggro, and shows you the line that you can dance around.
Lets do something similar with minions: If a minions health is equal to or less than your champions attack damage, the minion will glow...lets say gold? Players will get a feeling for lasthitting much quicker and easier with such a change. (Reminder: Minions (except supers) have 0 armor and MR, so if their health is equal to or less than your AD then your autoattack will kill the minion.)