I did traditional base MV 1, 2 and 3 after my peak in September 2018. I went from a natural regression post season FTP of 250 (high was 265) to a 287 FTP at the end. It’s starts getting taxing in TB 2, and really in TB 3.
So definitely wasn’t a waste for me, but I’m on a Base-Build-Base-Build-Specialty progression.