Re: checked on new hive today
Sounds like they're running out of storage room which might make them start working down below storing honey and building out the last frames. You could slip a medium super in there...they could use it for brood if they needed. If nothing else, you might end up with a super of drawn comb to use later on.
ETA: The medium wouldn't be as much territory for the bees to have to cover.
Warning: Rookie beek...take my postings with that grain of salt you keep in your pocket.