I did the MK EMM solo. It was still worth it just to get 7DMT and PP out of the way and use FP+ for something else. The breakfast is pretty good too especially if you can get a seat with a view if It's a Small World (but the breakfast location will be changed soon). If you can get the 7DMT FP, maybe you don't need it as much.
I find standing in line one of the most uncomfortable things I do as a solo so I love EMM. I get to ride and reride Mine Train and Peter Pan without an awkward wait in a long line. The breakfast is surprisingly good and will keep me going until an early dinner.