Sounds boring as fuck. Try changing your assistance template after 6 weeks, not 6 months. Now, if you're talking the BBB challenge (3 months), I would give it a rest and move onto a new assistance template. But I'm 38 years old and I know what that volume and intensity does to my joints. I'm hesitant to ever give the BBB challenge a go again (done it twice).
I love the 28 weeks of training template as it's written in the Beyond book. 6 weeks of rep maxes +FSL AMRAP rest pause upper body, straight set lower body, 6 weeks up up/down ladder for rep maxes + rep maxes on all down sets, 6 weeks of rep maxes + TM for max reps, then 6 weeks of rep maxes + joker sets. When you go through this template, you have a much better understanding of the rest of 5/3/1. And guess what, it's not boring!
When I hit 205 for 18+5+2 on bench in the 5s week, then hit 215 for 15+6+3 in the 3s week on bench, the motivation for each workout to hit within 1 rep totals on every week/workout become real and the progress isn't just measured in the PR set, but in subsequent sets of the template. try it out if you haven't!