Yes. This should always be a collaborative effort. However, in my place people say “Why do you want to change anything. It’s just fine as it is.”
As for collaboration, they see it as a way to rationalize work flow by dividing jobs up. Feedback is unwelcome criticism.
If we ask how something can be improved, someone will understand that we are criticizing them or their work. We stick close to the workbooks and publishers’ scope and sequence. Just deliver content and don’t ask questions. This is very common in ESL.
We have to be able to question and reflect without raising suspicion or provoking animosity.