Aquaman makes a good point, it doesn't look like there are any deficiencies, so don't go double strength or anything, but maybe one or two feedings with that terp tea bloom booster over the next week would be good.
Root development is one area I haven't done a lot of experimenting with. I do use mycorrhizae inoculant when I transplant and I also add kelp powder to my water in the beginning few weeks. I'll pretty much always transplant once during the whole cycle. In soil, your key will be aeration, the roots need micro-pores, which is why coco rules for water / air mixture, but soils can get compacted, especially over time with waterings. For better root development, make sure that the soil has plenty of perlite or you can even mix in a bit of coco.