This makes a lot of sense to me.
1. About to sign Dak long term, don’t change the terminology on him.
2. Can still run new WCO plays, just called using old terminology
3. McCarthy says he thinks 3:1 about the team program versus offense. So install your offense, help with game plan, but leave bulk of work to Moore. Said biggest lesson was person who installs offense during the week needs to call plays, so expect Moore to do that while McCarthy focuses on big picture program issues.
4. As said, still has final say and can ask for plays to be called.