This is a very important change from last year's approach as Matt Naggy had Andy Dalton running with the first team, Fields with the second, and Foles with the third. This division of reps seemed to cause that none of the QBs were ready for the season.
This new approach has been seen before and was proven to work. Tom Moore was the OC when Peyton Manning was in Denver, and this is exactly what they did. When asked about the situation, Moore replied:
Fields should be miles ahead of where he was at the beginning of last year and we all hope he exceeds expectations in 2022.