Great for Open Communication
I like your style Geoffrey. Your monthly coffee chats are a fantastic idea
as very often we all get too busy, therefore, put off following up on issues that are not directly related to the most immediate tasks on hand. A monthly chat provides a semi-structured forum
where issues (both large & small) can be discussed and resolved.
Negative feedback can also be positively approached
by using expressions like "you could try..." or "explore xyz..." etc. That way openness can be preserved, therefore, the moral courage is also intact.