One way to do this routine and perhaps avoiding getting burned out, is to add a light week every 4 week.
During that week, do two squat workouts, only 3 sets of 4-5 reps with 50% of your 1RM in each.
Eg, cutting back on both weights and volume.
Then jump back into the protocol the next week.
You need to sometimes train light if you want to train real heavy.
Not really related, but the reason to why Mentzer's clients had tremendous strength gains were because when he cut back their training, they could reap the the hard work done during the periods of high volume.
Mixing up the volume with weeks of lower volume, rest and intensity, will yield good results IMO.