The Destiny system is based on the architecture from Halo....and has been mondernized. The P2P parts of the network are most likely why the gun play for Bungie shooters feel so much more crisp and responsive than other shooters. Because if you think that dedicated servers completely eliminate lag or hit-registration failures you're fooling yourself. It just makes the compensations for lag more consistent...and lowers the bandwith necessary for a good connection. But that will also happen since the Bungie servesr will now be doing all the heavy lifting, rather than off-loading it onto player consoles like IN Destiny 1.