I think most of my problems post-transplant are due to how I was watering them. I'm hoping that now that the autopot system is turned on the The Hive (I hate this strain name with a passion) will start to look a lot better. They looked great before I transplanted.
I would think they would have recovered from that way back they will recover from pretty much anything while in Veg but not in flower, you lose time only and you can get them back to perfect, I think with yours they have done more adapting than recovering it looks like they all are suffering in the same way showing the same symptoms only in different degrees, I think the slow-release food is causing an imbalance where they are getting too much of something and not enough of something else, some of them may be a little more tolerant to it, my gut feeling says its the feed, Id test what the EC and moisture is deep inside the pots, then compare each pot are they the same readings. I use Bluelabs Pulse Meter for this and often find that the moisture holding capacity can be different in different pots all filled with the same mix, in a hydroponic nutrient solution, it can affect the EC deep in the pot, but in your position, it could affect the releasing of nutrients by the pellets, maybe.
Being great until transplant tells you something is wrong in the bigger pots and its consistent over all, have you ever flushed plants fed with these slow release ferts, Id be interested in what EC comes out over some weeks.
With the equipment and monitors you have if you want Formula One results, I would run DWC. dialed in It will blow away any form of live soil media regarding speed growth and yield.
Good luck.