I have a desktop and notebook. I play on my desktop primaly and when I go to my friends to play GW2, i play on my notebook. But updating both systems consumes much network and especially time. If you could enable P2P update within same network, that would offload your update servers while improving my update time. And my friends have updated their GW2 and they have slow internet connection, I can update my game with their updated content in a small fraction of time. With small updates this is not issue but with bigger updates it will help a little I think. WoW had that kind of update system which helped a lot with these issues.
And I wonder why progress bar is displayed according number of files instead of file size? That makes it a skewed progress bar and does not give me good information about how long will it take.