I never found Nog all that interesting, or that developed. Take him out of the show and nothing would have been any different.
I loved Nog but yes, I still agree.
If he was developed or not, his role didn't effect the show in anyway that would have made a difference.
Morn got a story simply because they had to create stories to stretch the season out.
While the writers were spending time developing the secondary cast, they completely and admittedly dropped the ball on developing a main cast member- Jake.
It's Only a Paper Moon.
Hologram, supporting Ferengi, superb episode...
Yes it is but it still doesn't effect anything on the show, only the character himself. If it never happened nothing on DS9 would be changed by it, nothing change because it did either.
Nog's development has no effect on the shows theme/plot what so ever. His stories are basically well told filler to stretch out the season.