In the sense of actually transitioning someone from a casual player to someone with a deep understanding, simplified controls are really a band-aid. It's a good start, but it's not going to teach players nuance. It'll make them feel like they can make something significant happen, but the thing that's needed most is detailed tutorials and trials which drill them on core fighting game skills.
They need to be taught what a high-low mixup is and which characters will most likely try to hit them high vs. low. They need to be taught when a character might go for a grab. They need to be taught how to close the distance when their opponent is using full-screen projectile attacks. Really, they need to know the kind of stuff you'd normally learn from a more experienced player sitting next to you. But most people don't have that. So the best substitute is a really detailed lesson plan. It'll never happen in a Capcom game.