I completely agree about the issues with the Court.
In contrast, including Thorne and continued corruption as a B plot on the Bruce Wayne side of things wouldn't be redundant, but a furtherance of the plotlines from the first film. Real's election victory and the exposure of Falcone's embezzlement from the Renewal Fund shouldn't just wipe out corruption. Rather, the forces of corruption ought to be striking back. Real will hopefully come to the realization that it is not as easy to govern as make promises in a campaign. Continued corruption and Bella's need for allies would be an impetus for Bruce to have get out there and develop a public persona as
@DeadlyWest mentioned.
Making the Court behind Gotham's corruption undermines those ideas, development, and natural storylines. It turns a public Bruce, reform the system problem into a Batman problem involving punching supervillains (ie. Talon) and arresting people.
Reeves is very clear he wants to make sure this stays Bruce's story throughout the trilogy and that he is the most important, most interesting character. The only other film to really effectively capture that before The Batman was Begins. Even after Bruce returns to Gotham, the movie effectively sets up a conflict for Bruce as Bruce and not just as Batman, ie. The conflict with Earle over control of Wayne Enterprises and keeping its business ethical. The Dark Knight only really used Bruce as a tool or disguise for Batman to investigate Lau.