At the point you are feeding 14x a day (or more), I would imagine the effect is pretty similar to just being in dwc. I am curious to see what those roots look like in the end lol.
I kind of think of the roots and leaves thing as kind of a give and take of economy. Like the leaves can turn light into sugar and feed the whole plant but they need some other nutrients sent up from the roots in order to do that. The roots expand their capacity based on getting enough sugar from the leaves (and being able to breathe) and the leaves expand their capacity based on what they are getting from the roots.
So long as the roots are continuing to push what is needed to the leaves, the leaves won't care. The roots are getting what they need, so they don't care. There must be an upper limit on how much you can get out of root absorption and that limit is higher with more roots I imagine (hence outdoor monsters with huge root systems), but the plant does not need the default behavior of "keep growing longer roots to find new nutrients since we are sucking up the old ones faster than the ground is likely replenishing them given most ecosystems" that genetics have given her. If she doesn't need to do that, she will figure out it's whatever and get on with it, right? At least well enough for our purposes?
I guess that is what we are finding out.