I absolutely agree that there are talented people at MMM and that the next gen of talent should have the opportunity to shine, but it doesn't change the fact that MMM have somehow made poor decisions in recent years getting a poor return even on major investments (DBGT?, etc).
If John is involved, I think they will be listening and whilst he may not be involved as much as some, I think he will have the power to veto any really bad decisions, otherwise what's the point
He has done it before even when contracts were at an advanced stage (SW1 and SW2 disappointing pipeline coasters).
I don't think it would take months of his full time involvement to prevent them from taking entirely the wrong path.
A bad idea, is a bad idea. Whilst there may be subjective differences of opinion on Nemmies's direction, I am not expecting any major objective bad decisions.