The problem is the push to put more airplanes through the system, and the bottlenecks to the system. Every few weeks you see a video about some near miss in at EWR or LGA. We need to simply tolerate less efficiency or hire more people.
Also, and this is a really controversial take, as an AI adjacent person now that I’m not in the cockpit, I think LLMs and AI are a natural solution to some of these problems… I see ATC getting automated before SICs are.