I don't know if I'd say Maurer has developed faster than JT.
I think RPO is honestly the main reason Maurer went from true freshman to backup to starter. It's a dynamic you give your QB that completely changes how often defenses blitz. It's why despite rarely throwing the ball Kentucky's offense beat Arkansas and was able to hang in there with Georgia for the first half.
Having a QB that can successfully run RPOs is just an extra threat to help an offense move the ball. It's honestly one of the reasons JG was so bad in Butch's offense and is still not "getting it" when it comes to audibles and play selection. I really feel like it's a gut feeling more than film study and the truly elite QBs have it. Peyton did a ton of work in the film room, but on game day he knew just from how the game was going when was the right time to dial up the appropriate play. Don't believe that, rewatch the first super bowl win against the Bears, he didn't have a great personal performance but the way he called that game offensively was masterful.