True. I actually do have same dilemma: i’d like to do full TBHV but thanks to lot of long rides over summer TBHV1 feels too easy so far (1st week currently). So I “polarized” it slightly:
Tue/Thu - follow progression from short FTP boost plan,
Wed/Fri/Sat/Sun - use rides from TBHV1 (2:15+ Z2, sprinkled with 20sec sprints every 20min to keep it interesting)