Concern with phals in s/h

[Eyebabe]

About 8 weeks ago or more, I repotted several phals in s/h. The larger size PrimeAgra was used.
I washed the PrimeAgra and soaked in KLN 1tsp/gallon prior to potting...followed instruction to the letter
They are all in low light/east>south facing window.
All light is indirect and strongest in the morning as a tree is in front of the window and the sun is past the window by 11am.
Humidity tray type stand with seedling mats below.
Temperature is generally about 68-72 degrees and may even get to the mid 70's during the sunlight hours.
I was able to tightly pot the 6-7 largest plants, but the 4-5 smaller plants seem unsteady still in their 3 inch pots.

I have four large-6inch potted plants (two of which were doing meh prior to the repot) that are doing very well. They all have new roots growing and one threw out a couple of new spikes from previously cut spikes. It will flower in a few weeks! Should I be concerned however that no new leaf growth has occured?

I have about 4 medium sized plants in 3 and 4 inch pots. They are doing pretty much nothing. The roots are not rotting...but there is no new growth of any kind. Nothing
Two of them are quite special to me and I am
What can I do to stimulate them?

Finally, about the smaller ones. I have two small species each with one functioning root that looks stressed. The leaves are good and one is blooming.
However no new growth.
Two other small ones are probably going to be fine as there is new root and leaf growth despite the lower leaves and old roots withering.
One however, I am concerned about losing as the roots are all crap as well as the leaves despite two gorgeous spikes that are fully blooming.
Again, how can I get things moving faster?
Or am I just impatient and expecting too much too fast?

One last point, I recently got two very small(3 inch pot) phals....one of them a very expensive Phal violacea. I am quite content with their small size to leave them in the New Zealand sphag moss. They seem to love it!
Should I take the smaller phals above out of their s/h and put them into NZSphag? I know for many people Sphag doesn't work but for me it does well.