Yeah, bro, that's why you shouldn't have tweaked Bug's recipe because that boyo feeds every day. I'd imagine that once the root development is more mature, you could do the same in that heavy vermiculite mix or just continue to feed when dry. It's just that when you treat soilless like soil, you're going to get soil like growth. No big deal though, and I get that you did it so you would need to water less often.
As for feeding, yeah, the seed has enough energy to sustain itself for a week or so, but my final coco prep step is to run 0.4 EC through it a day or two before planting and once it's above land for 24 hours, that bitch is getting ~0.4 EC for a week and then ~1.0 EC starting on week two.
I'm also a silicon convert. Having grown fine without, there is definitely a very noticeable difference growing with it.
As for Bugbee, that dude was growing weed for the same reasons we all do before he got his degrees. In my opinion I haven't seen him say anything that would suggest he's compromised and he got into making sensors in his garage because he's a horticultural scientist that was looking for the best tools for his work so he made them.