Remember, the party search feature also works for trading, and it is easier to add hench/heroes to your party.

You completely left out one thing, reconnects! :P

Reconnects work really well from what I've seen so far. Unfortunately, it lets people leach in ABs, and FA a lot easier. They don't even have to worry about getting disconnected anymore.

No longer will we be almost about to beat a mission and err7. Reconnecting is just a matter of clicking a button and Guild Wars attempts to load back. No need to enter your password again.