Hey rgp sorry about the nasty flu, hope your feeling better!
Temps are good humiditys low for drying.
But will you start another grow straight away? Or dry first. Just asking as turning off your lights might raise humidy.
Hard to see the leaf colours clearly under the leds- but i cant see any major deficiencies.
A little yellowing of fans at day 58 isnt that serious anyway.
If your worried though get us a picture under natural light if possible.
As for the sugar daddy- go for it!
Just googled the ingredients, i think itll help those lighter coloured leaves and it might help fatten up buds even more.
I would start adding it now until harvest at 10-15 ml per gallon