Huh? There is no board that does this. As I'm sure you're aware, there is a statutory board where URL LTs from multiple communities are selected for O-4 from the same pool, and there are community administrative boards that select officers from within specific communities for career milestones.
The SWO (and sub) communities conduct their DH screening at the tail end of a JOs initial sea duty because it was advantageous to do so. These communities can also allow said officers to do NOB post DIVO shore duties because the timing still affords them the ability to get two years into an at-sea DH tour as a LT and earn competitive paper for LCDR screening. While the aviation community doesn't have that particular luxury due to initial schooling, azguy's broader question is: what is the aviation community attempting to change within the administrative process to make officers and the community as a whole better set up for success?
Are the "flying/developing/learning/teaching" billets in aviation looked at differently than other "instructor duty" billets at the statutory boards? As an analogue, I've never heard someone say that a billet at NPTU as shift eng or a tactics instructor at sub school would play better for O-4 than other shore duty options within our community.