If D was doing everything from 4pm on, I think they would possibly opt for a platoon option at midday, but leaving the 5 vacant suggests that SOMEBODY will get a full-time weekday assignment. I'm assuming that it'll be Janssen, Joyce & Donovan until they make an announcement, but I don't think there's any rush.
Semi-related, I never knew they made a sports anchorless 5pm talent rejoin after Dan retired. It's obviously now out of date, but it was just Micah, Ray, Tom & Shannon. I don't like not declaring a sports anchor at the evening hours, but whatever. I hate that they can't officially name JP to the 9. Having a declared sports anchor at 4, but carrying a rotation on all the other shows is so weird.