From the look of this weeks first pic, I'd say you could defoliate slightly, I dont think its recommended to take more than 20% of leaves on the whole plant. If you're not getting sunshine from morning to night giving it the full cycle of sun from the one side to the other, then I think small defoliation could help if you have excess leaves. However, the leaves do help power the building of the buds, so if you believe theres enough penetration occurring, then I would leave as is.