Well, just contemplating analogues: in VS community AFAIK a single AW of the Viking crew, SENSO, ran everything: radar, buoy acoustic apparatus, ELINT and MAD, a job the Royal Navy had always thought demands broad horizons and thus is too complex for enlisted people. But USN VS crowd had good ASW objective results, comparable to NFO-dominated VP world. So why then was it impossible to put AW in Prowler at least for ECMO-3 role or Hawkeye for RO job?
@Pags outlined the general Navy philosophy well. As for VS, in terms of workload, in a Viking most functions could be performed from either SENSO, TACCO, OR COTAC/Copliot seat. There were some compromises. Display for COTAC was too small to perform all of the typical TACCO duties, and although the TACCO could view the audiograms and if knowledgeable enough help out the SENSO, his display was not optimized for the SENSO duties. With that flexibility each crew would determine the division of duties based on the mission and projected workload. It was not the case that the SENSO operated all the sensors. On a serious ASW mission the COTAC might take the radar, the TACCO would set up the ELIT search windows and the COTAC/Copliot ( some crews would be two pilot, most had a NFO in the copilot seat) monitor it. Because we only had one SENSO, doing essentially the same job as 2-3 in a P-3, on ASW missions the SENSO would concentrate solely on the audiograms. He had to be on his game. There wasn't a crusty AW1 looking over his shoulder. The TACCO would set up search patterns and tactics, deploy the buoys, and communicate with the tactical players in surface ships, other VS, HS, or VP (ugh). The TACCO would always deploy and operate the MAD system since it was only used for final localization and attack. The torp was dropped by the TACCO or on a call by the TACCO. This division of duties between crewmembers would vary from this for SSC/surface attack, ELINT missions, mining, etc.
Although the original crew make up worked well, all your eggs were in one basket. If you had a week SENSO you were screwed. There was no real OJT. No senior AW on board to mentor or supervise. You might draw a AWAN fresh out of the RAG or an AWC. In the 90s when it was determined the sub treat was minimal, several squadrons operated with a senior AW in the TACCO seat and a NFO as copilot. The COTAC ran the show from up front with a small display and smaller one handed keyboard.