In my line of work I occasionally deal with a Federal regulatory board comprised of presidential appointees. Three of the five seats are vacant, and I don't think anyone has been nominated to fill them.
I think Trump fully intends to keep many of these posts vacant indefinitely.
Lots. Lots not confirmed and lots not named. And you are right about his not planning to fill them all, but then he ends up with departments that don’t deliver on his policies. The biggest one of course is Justice. But State and Defense are that way as well. Of course, listening to Javanka on a lot of top hires, since they brought in a lot of Never Trump Manhattan liberals, made that something of a moot point.
Mulvaney is a great hire, and I hope he can straighten out the rest of it. Because it outwardly looks like he’s continuing on a somewhat questionable path of replacing Swamp with Swamp in too many areas.
God bless him, he’s taken on a Herculean task. But he has also made that task harder for himself especially with his hires.