I bought a 1959 and wish I had gone further with my remodeling than I did, and I took out all the floor down to the studs in the main level and filled everything with soundproofing insulation before redoing the subfloor with 1 and a 1/4 inchs of OSB that I glued and compression screwed to the joists. One thing I’m very happy I did do was run Ethernet to most rooms while the floor was open, having all go to a central hub in the utility room where they’re connected to switches, one for the upstairs network, one for the basement network since I also made the basement a separate apartment. Long way to say I wish I had planned out every repair and remodel and upgrade I could think of before ever touching a hammer so I could just do all the demo and remodeling at once. Now I’m stuck wishing I could go back and redo all the old electrical and plumbing before I had done all the finish work. Learn from me young one!
Agreed, none of the others are balanced properly or have good flow. Number two is the only option.