Partial harvesting happens but these look to early. Can you bend those over some? You can also defoliate some of those leaves blocking the lower bud sites 
Agree with OG, just move the branches some. Lower branches will always be smaller. Its just they way the plant grows. Removing the top colas will take away the best producers. I never worry about it. In the end you will get more product by letting the plant grow as naturally as possible. Removing leaves to keep air flow will help prevent mold issues. Nutrients in the form of sugars that are needed for growth are produced by photosynthesis and are mobile, so the plant will move them to any area needed, even the parts shaded and they will grow.
The tops stems are stiff and I think they will break I’ve been defoliating every other day
I have some clips on them already
It’s kinda hard to put clips on that 1st one due to bud size and the way it’s growing I wish I could post vid but it won’t let me
All are different except for the purple one
Beautifully done!!