So - Melchizedek had the highest priesthood and gave it to Abraham or blessed Abraham via the MP.
The Savior gave Peter, James and John the MP.
What happened between? An apostasy before the Apostasy, I believe?
If so, marriages and other MP-requiring ordinances performed in Temples prior to the Savior's life (and after - up until the Restoration) were perfomred via the Aaronic and Levitical priesthoods, no?
Therefore, Temple Work needs to be done for those who lived after Abraham and before the Savior, no?
Part of this would include me serving as proxy for Solomon being sealed to his 700 wives and 300 concubines (w/ the acknowledged caveat that most of his marriages were political and that concubines were not wives but doing Temple work / showing devotion "not for the weeds" is also a net positive thing to do), no?
I'd be disappointed to learn we cant do this Temple work until the Millennium, when all those who passed away will do their own Temple work. Bruh.