Thats your perspective, but I dont agree with it. There is no reason for Rivera and g man to rock the boat by bringing in Ramsdell if they were satisfied with Shulas job performance.
I mean, if the above is 100% reality in his mind, it would've been easy to just let Shula go and hire Ramsdell as OC. Before Smith got hurt, I feel like the offense was more or less exactly what Rivera wanted.
So other reasons to bring on Ramsdell -
*he can actively help out
*our QBs coach and WRs coaches are bright and probably going places, but both have minimal coaching experience, so he can mentor and fill in the gaps where they aren't as strong
*Shula himself can always use some help
None of that means "Rivera wants to fire Shula." Yes, Ramsdell can most likely succeed Shula and, if it's required, he probably would. That's another reason he's valuable, but it's not like they're going to keep a guy like that behind glass either.