User blog comment:Komodo Saurian/Last Light interview (Russian)/@comment-1403643-20111015222156

Most important info (IMHO)

1. Multiplayer + coop mentioned.

2. Morality points + stealth mechanics + armor attachments + trading system will be left mostly untouched, but will be explained to the player less vaguely than in M2033.

3. No sidequests.