So you're staying they should moderate their own areas unless another area needs to be moderated, at which point they should moderate that one too.Thats because of the way the usergroups are currently setup. Unless urgent action is required (ie someone posting porn where they shouldn't), the new moderators know to handle their own areas only for the time being.
Please dont assume you clearly know exactly what we want, or what has been discussed in private with the new moderators because... You don't. It was even mentioned in the original post what their responsibilities are so instead of being an ass about things how about a simple congratulations and move on your merry way. If you can't manage to say something nice, then probably best you don't say anything at all.
You have global moderators.