As little of Jim Gordon as possible.
As little of the non-essential barely-canon characters as possible. Screw Barbara, Freeze, Tabitha, Firefly, Lee, Grundy, Strange and Bullock. I actually like several of them, and I really like Bullock, but I don't think they deserve a lot of focus at this stage of the show.
Bruce has to step up to lead character. Selina as deuteragonist. Joker as nemesis. Penguin, Ra's Al Ghul and Riddler as the "old guard" villains.
Don't try to "tell to much". Keep the story simple and straight-forward.
I think it's pretty significant that Metropolis got semi-canned. I don't think WB are happy with Stephens and Cannon.
Ideally, I'd like a new, true Batman show after a few years. The cast is fantastic.
And someone please dump Peyton List in a trashcan. Give me back Clare Foley.