I loved the new features on the E-D Bridge. For such a big starship, with over 1000 people onboard, the flagship of the Federation, the bridge only had a maximum capacity of 11 (13 if you include the small benches next to Riker and Troi)? That always seemed odd to me. The new consoles made it look busier and not so disjointed (our heroes are at the front whilst nameless extras can just be seen in the far background, the GEN Bridge brought them forward into the action).
Worf getting a seat made a lot of sense, and rising the command arena up also gave them a little bit more importance.
As for what the new consoles did, I believe the port side was science and starboard was communications (or is it the other way round?).