I'll be honest there aren't many things I like.
- On the heavy day even 3 clusters is too much if it is used for the whole cycle. I would actually keep the sane (or a similar) intensity level for 3 weeks but increase the stress of the session by changing the number of cluster sets:
Week 1: 2 regular sets + 1 cluster set
Week 2: 1 regular set + 2 cluster sets
Week 3: 3 cluster sets
*Cluster sets being done with 5% more than the regular sets
I do not like the idea of changing the type of deadlift every week. I understand that you were heavily influenced by Westside, but to me the REAL secret of Westside is in the weakness correction approach they use NOT the way they do max effort. I believe that if you want to be good at a lift, practice that lift more often, don't change every few weeks.
You are doing WAY too much work on the light day. Even if the weight is light (IMHO too light to be of any real benefit, especially for 3 reps) that is 36 reps of deadlift... too much IMHO. And the 65-70% load for 3 reps will not cause any physiological changes... they might allow for technical practice but that's about it. But if you wanted technical practice you SHOULDN'T do both types of deadlifts, especiaily not in the same session (confusion of motor pattern). You could argue that using both types will lead to fuller muscle development, but with the sets of 3 at 65-70% that wont happen, you wont even recruit any of the FT fibers on any rep, much less fatigue them enough to train them.
Why no squatting? Injury? The squat is one of the best exercise to strengthen the start of the deadlift.
I cannot give a full critique of the plan because you don't even tell me the MOST IMPORTANT PART: which assistance exercises you are using. Without that info the plan is irrelevant and impossible to judge the stress level. 6 sets of 6 reps (way too much BTW) of glute ham raise will not have the same stress level as 6 sets of 6 reps of romanian deadlifts which will not have the same stress level as 6 sets of 6 reps of pin pulls from below the knees.
On the heavy days assistance should be mostly low stress work, basically bodybuilding work to build the key muscles in the deadlift. And using moderate weights for higher reps, 8-12 for 3 MAYBE 4 sets once in a while.
In general you seem to design your programs emotionally... you want to improve the deadlift so much that you are just pilling on the volume. When you are natural doing too much volume is the no.1 mistake that can ruin your training.
All and all II would go back to the drawing board, I don't see how that plan could work well, sorry.