But wouldn't Bane see that coming too? Also even if we ignore the Talia twists(which I personally like to do), Batman still had to create some sort of plan of attack so that random pot-shots wouldn't happen or making sure that Bane didn't decide to activate the core early. So if he were to do somethine at night..he should've at least spent the time doing something that would make it easier to find the nuke/core/whatever. Besides Batman was MIA for months..on top of the years prior to said months, so I doubthe had the time to work out a plan at night.
To be honest, I'll actually buy the "I'm Batman" excuse for that.
Batman would still be outnumbered even if he had the advantage of night/stealth on his side. The Bat being hidden in plain sight is another issue all together. The scene with the bat signal was in general kind of stupid, though admittedly pretty cool to watch. It was a waste of valuable time during an even which required no wasted effort. It also implies that Bruce actually made it to Gotham before nightfall or likes to make side-trips. Well I guess he could've been doing stuff before then.
Yeah...the unarmed(or poorly armed) cops charging at the armed criminals and tanks was another of the movies mess ups, though I ignore that over the more pressing ones.