From my perspective, it always seemed like the ETs had better knowledge to qual EWS/EDPO but were far less motivated to do it because they didn't have the excess personnel available to stand it. It was just viewed as another way that they can get boned with extra watch or duty when the CPO has something more important to do than stand his watch/duty day.
But when you have 13 M-divvers and 5-6 ELTs, there are bodies to spare to lend an E-6 or motivated E-5 to the full-time EWS/EDPO watchbill.
I do not recall much about the inner workings of of the RC Div but the RO "stuff" of the EWS/EDPO qual was definitely the most tedious part of it all, and in practical application seemed to be the most useless as there was always an RO or SRO on watch to handle it,...
It was always "nice" to know what the RO/SRO was expected to do (and why) but they were consistently more adept at their job than any non-ET EWS/EDPO or EOOW/EDO,...
It still had to be done to get the qual,...
And yet, I can remember "coaching" an E-7 ET/SS EWS on "righty tighty lefty loosey" for his requal (or was it a proficiency?!?!?!, meh, it's been a long time),...
And I'm pretty sure it was not my consistently pleasant demeanor which made him fail open,...
Just not cut out to instinctively know what to do with big valves,....