All very good points and I agree. I'll admit I havent watched a ton of Salter, but what I did see was really good. He does have the ability to be a great pocket passer. I also dont think it would be a problem for them to share RPO concepts as most of those aren't designed QB runs, instead RB gives/or throws. In other words, Salter looks like a kid that can run a pro style offense with some wrinkles, and Bailey is one that will exclusively run a pro style offense.
I guess the differences would be designed QB power, sweep, Zone R, and RPOs w/qb. For a capable runner like Salter, there's alot more Chaney could do. If Salter is the starter, the offense would need to be tweaked to his style to fit strengths and vice versa. Probably wouldn't be a massive undertaking, but I'm sure it would pose some challenges especially if it was installed mid season bc of an injury. BTW, I think the offense would definitely need to be adapted to Holiday's skill set if he is ever our QB.
I know it would never happen again and it makes me want to vomit thinking about it, but remember CBJ having Worley and Dormandy running zone and reading the end over and over getting smashed?