For most people, I'd say a mid-day break is inadvisable right now, with the short hours.
But we were there last week, and took a break of some sort most days. We are frequent visitors, and will be back again, so it wasn't vital that we hit every open attraction. And we were able to do so even with our breaks, to be honest.
A big part of the reason we took breaks was because we were staying at Yacht Club thanks to a great discount. We wanted to take full advantage of the wonderful Stormalong Bay. And it's such easy access to Epcot and DHS from there.
On our MK day, our break was a lovely boat ride to Wilderness Lodge, and a drink and snack at Geyser Point, our favorite hidden gem. It was relaxing and energizing at the same time.
For AK, we didn't break, but we left early in the afternoon after doing everything we wanted, to take a Lyft to Disney Springs for some shopping, then a bus to the Poly for a drink and snack before getting the bus back to YC from MK.
We had a fantastic time, and found the entire trip such a great escape from reality.