I think the movie could've been improved by being a little less ambitious.
-What about Bane attacking the Batcave and holding Batman there for a bit instead of the whole "5 months in desert prison" thing?
-Instead of messing with Gotham for almost half a year, it would've made more sense if he just wanted to f---ing destroy it.
-Getting rid of the Talia character and making Bane the only villain.
-I wasn't opposed to Blake, but I don't think he needed to be in the movie so much. I also would've killed one the main characters (Gordon, Alfred or Fox) at some point in order to raise the stakes.