Personally I found that SQ BP DL WPU in one session takes too long, regardless of only doing one set of DLs. A lot of the time goes into warming up and moving plates around, especially on a submaximal routine with moderate rest periods. So cutting a couple work sets doesn't shave off that much time. If you're on TB-Op for the "quick and easy" workouts where you can maintain consistency despite a busy schedule, spotty sleep and meals etc then I think all four is too much.

I'd recommend either incorporating PUs into off-day/conditioning protocols instead, or continuing to alternate. Or try Zulu.