I'm not trying to step on anyone's toes, but I will speak fairly candidly.
I very well may not fully comprehend flight suit regulations. However, I do know this much: flight suits are not a service uniform and as such are not authorized for wear in public (save your standard quick stops like gas, child care, et al.).
Navy Uniform Regs 6803.2 a) "Flight suits may be worn by aircrew members and individuals engaged in flight or flight-related duties during that working day. [...] Flight suits may be worn to/from home and work to include brief and appropriate stops, on military transport aircraft, and to official business meetings away from home station when the wear of flight suits is appropriate for transportation, or for the level of meeting (i.e. working meeting)."
Obviously the gray area that causes problems is "flight-related duties" which really should include anything you're doing at the squadron (ie, bags all day at work). However, the second part is pretty clear on wear outside of work. Flight suits are equivalent to what utilities used to be, and while wear is slightly less restrictive than coverall wear (never outside the base), its always frustrating to see officers get on enlisted guys about proper uniform wear, and then see these same guys grabbing lunch off base in their flight suits.
Is it really that hard to lead from the front? If you're going to enforce uniform regs on your subordinates, first make sure you're complicit with them yourself.