Interesting observations mate! I've taken a 'leaf' out of your book and done the heavy defol last grow and the difference was pretty substantial. I'll be doing it again this time too. I seriously need to look into one of those Gavita's though, they look like they far outgrow any other lights!
Lol, you are growing Putang Magoo (Mass Medical strains Putang - tangie X ?) X blue Magoo bx2 (basically blueberry) X Berry Lights Og (NL#5 X Blueberry) X Tahoe Og Kush. Should be some really frosty, solid buds hey!