That sounds 1) Like the ideal theoretical Scrum. (I've never actually seen that in practice.) 2) Like a lot of converting, estimating, splitting, recombining,

That sounds 1) Like the ideal theoretical Scrum. (I've never actually seen that in practice.) 2) Like a lot of converting, estimating, splitting, recombining, and rating. (So, that's a full-time "Professional Scrum Master" position, then? What happened to "Agile teams manage themselves; 'scrum master' is at most a rotating part-time task"?)