If it's crap ... We'll tell you
Love your third point there Snafu. You didn't even need to write anything, the picture said enough.
Damn hot heads.
The only purpose I can rationale for Modine's character is that; before Batman showed up, Gordon had no power in the GCPD and the city was corrupt to the gills. The only way it was cleansed was due to his trust in Batman, in turn becoming a dynamic duo of justice. If it wasn't for strategizing with Batman in accomplishing their previous efforts, Gordon wouldn't have risen to higher ranks as an officer, either. So essentially they needed each other to tackle crime and cement justice. Once Batman took the fall for Harvey's bullshit and disappeared, the very foundation that saved Gotham broke. Yes, we have the Harvey Dent Act to sort shit out and make Gotham a safe haven, but that just meant an empty playground for a violent enforcer was ripe.
Once Bane decommissioned the commish', and was replaced, he was replaced by Foley who didn't know what he was getting himself into and lacked the experience and necessities (Batman) to strategically tackle a situation of this magnitude - hence his demise. Gordon was the first and only officer, and head of police, to trust Batman. Doing so was a benefit to the city.
Batman + Gordon = Gotham's protection.
Basically, Foley represented what would happen to the GCPD without Batman. GCPD needs Batman and Batman needs GCPD. Neither can work alone, they must be compatible to achieve victory.
Still a weak character, and everything I wrote was hamfisted. Still, I think I found a way to weave his presense as an understandable one.
@ Scrump Bolymeaux
I agree with you that the role he played was kind of critical, but what I don't agree with was his acting. I don't know why Modine was acting like he was auditioning for Captain Stacey for Spiderman 3, that's all I'm saying, the other actors seemed grounded he on the other hand felt like a comic book character.