Should I defoliate this a little heavier if this i...

I think it looks fine, and I would probably leave it alone as it doesn't look mandatory to defoliate further. That said, it will also be fine if you get a few more of those fan leaves off. Defoliation of large fan leaves at any stage during flowering, is something I practice when they are blocking lower bud sites is (although a hotly debated topic). When I see its necessary to open up air-flow and get light penetration optimal at any stage of growth I will do it as long as its lower fan leaves. I would just go very cautiously the later in the game you get.