Glad they are looking better, As I Suspected it looks like a combination drip, and water culture (even though I cant see inside). But that's not a problem, it just helps me to picture the setup. I see one straight line to each plant with only one drip point. A circle with multiple holes will help distribute the moisture better. The bad thing is they look like small (3-4 inch) baskets, and making the round circles without pinching it may be hard to do, even with 1/8 inch tubing. I can think of a possible solution to the pinching issue if you want to try it. I would be a little concerned if the
nutrient solution was running 24/7, during the day. Especially with only one point of dripping (depending on the flow) that could suffocate the roots in that spot.
P.S. A couple of things that I can see a problem with that may be a problem in the future. One is that the container does not look like it's light proof (completely blacked out inside). The other is I don't know what your weather is like but the water (nutrient solution) in the container may very well get too hot (above 72 degrees) sitting outside in the sun.
As GGM mentioned a air
pump and air stones in the reservoir wont hurt regardless. Although he was talking about making it purely a water culture system. To answer that question, the roots need to be touching the water or they cant wick up any moisture (taking the place of the
drip system part), but as the roots grow you could lower the water level.