>Should I return to feeding the hive now that it is so reduced?
Isn't that what got you into this mess? I would only if there is no nectar flow and then you need to watch for robbing.
On the 24th there was lots of capped brood. Now there are frames with honey crowns and wide open spaces of open cells in the upper deep and the equivalent of one drawn frame in the lower deep that is also empty.
I wrote the question about restarting feeding guessing that you would respond as you did!... but I was afraid that they will not have much more time of flow in which to build back up.