Re: In hindsight what changes would you do
Bruce did need Batman in TDKR. He needed to go out at night and that's why he went out even when his body was way past his prime from BB/TDK and he didn't care if he died once he stepped out, as Alfred even acknowledged. I thought it was clear that Bruce needed Batman as he stayed away from the cape and cowl while the Dent Act cleaned the streets. Once something bad happened, boom...Batman returns and Bruce was just waiting for that moment to happen.
And still...people think he died because of Rachel. If Nolan or both brothers do commentary for the trilogy, they need to exclaim that he did not quit because of Rachel while commentating on TDKR, lol.