I wish they would have explained the ward tning better. In mass effect 1 you had the area listed as wards and the presidium. The wards seperated into upper and lower wards. Which was were C-sec and the scummy organizations were located.
The last to games take you to Zakera ward. Which goes through multiple redesigns. In one game it's by the gift shops, in the next game its by the embassies.
The mass effect 1 layout is better.