I liked the sewer team up, the music was great and it was fun, but I was expecting like a 2 minute scene or something of Batman being stealthy. It was more of a montage.
I actually think these types of scenes helped the movie. It gave it this frenetic feel, almost single-minded. No more wild schemes (TDK), this was the most serious threat yet and Bane simply had to be stopped.
All these short and to-the-point scenes give you that sense that you are being driven toward something. Just like how Batman in the end doesn't resort to any tricks, he just goes straight for Bane and beats the crap out of him. There is simply no time to mess around.