Saints to interview Aaron Glenn on Jan. 10th [Nick Underhill: Glenn probably gets an in person 2nd interview in a couple of weeks]

I think the only real benefit firing DA mid season was that we got to get a look at Rizzi and Young as DL coach . And we got rid of Grantham. It never looks good as an organization to fire a HC mid-season and RARELY makes a difference
I mean, as a rule I normally would agree, but this was the exception because of how much discontent there was. I would add that in addition to the benefits you mentioned, I believe Gayle pushing the issue spurred Loomis into getting his ducks in a row for interviews. It seems like they're doing their due diligence this time around.