This is so typical of why teaching has become ridiculous in many schools.
What happens is that instead of dealing with individual issues that affect the quality of individual teachers' practice, schools make blanket decisions about teaching.
So, as an example, because some teachers do not/can not think through lesson planning in a succinct way to ensure it is engaging, effective, assesses how children are progressing and deals with any 'sticking points', schools introduce cumbersome lesson planning structures for ALL 50 teachers. 35 of those who are excellent teachers, who can plan very thoroughly, delivering effective, enjoyable lessons, and need to record very little of that process are then totally pissed off and it adds 10 hours of unnecessary paperwork a week to their workload.
What should happen is that the other 15 who need varying levels of support have a round of tailored CPD spread over a term, plus some individual support from Lead Practitioners to help them plan effectively- to understand the process of lesson planning and connect it into learning, progress, assessment and engagement. Some of those 15 will get it quickly, some might need the whole term of support, some will need much less. One might never get it and then that has to be pursued. The end result will be much more effective, and the staff who could do it already, have not had masses of work piled onto them unnecessarily.
Another example- there are a few teachers who can teach great lessons but spend a chunk of them at their desk directing the lesson from their desk. However, there are others who after 5 minutes sit down and do not deliver good teaching and learning _ and are not even aware of that or don't care. SLT, rather than deal with the individuals, decide no teacher should sit down at all during a lesson. They then start checking up in that, wandering round the school, adding it to lesson observation checksheets. It's madness. Deal with the individual teachers and their practice! Have the uncomfortable conversation with Mrs X who is lazy and as long as the class are quiet thinks she has done her job. Don't make 50 staff spend 6 hours a day never sitting down when it is completely unnecessary. I can guarantee Mrs X, even if she is walking round her room continually, is not delivering better teaching, and I can guarantee that Mrs X is not walking round her room continually even though SLT have told her too. Meanwhile all 50 staff are knackered.
Schools create their own problems with this stupid stuff. Personally, I think teachers need to spend chunks of the lesson around the room- seeing things from students' perspective in the room, being a presence, checking progress and understanding, building relationships, quietly 'managing' the room. BUT, not necessarily the whole lesson, not all of every lesson, and perhaps very little of some lessons. Good teachers have good judgement of how to deliver lessons effectively. Good SLTs value that and trust them and deal with the ones that don't, helping them to improve.