The thing is, you can compensate for the lighter loads by doing more sets with perfect form & focus at the beginning of any given block, and then gradually decrease the volume as you near the end of the block. This way you won't be ''wasting your time'' in the first couple of exercise days.
The lighter loads also serve the purpose of allowing some breathing space between the heavy loads and CNS fatigue of the previous block, keeping overtraining at bay.
You can also start off with relatively heavy weights and use small increment increases, if it feels better. Generally it's best to use bigger increases for the heavy compound movements and smaller ones for the isolation exercises, though.
If you have been slacking off in the gym as of late, you might as well go for a week long strat decon. It should be sufficient.
