We are two adults and most definitely do two days at DHS. We last visited in October 2019. Toy Story Land and Galaxy's Edge are still popular with a lot to see and long-ish waits for the attractions there. RnRC, TOT, and Runaway Railway will get long waits. We also like to eat 1-2 TS meals there because we think DHS has much better TS meals than QS meals. Also like to spend time at Oga's Cantina. Shows won't be running for the foreseeable future which saves some time, but given that FP+ won't be an option and no one knows yet how good/bad standby times would be, then I would definitely plan a second day at DHS. Right now with the limited operations and construction, I would choose a second day at DHS before a second day at Epcot, and Epcot is our favorite park.