I'd like them to enable other clients apart from FFXIV on their tracker. At least some perhaps some approved clients on a whitelist basis, rather than a general free-for-all. (utorrent perhaps for one).

The fundamental flaw in the P2P update model in this instance is that people don't continue seeding, because as soon as the update is done the client moves to the next step of applying the update and launching the game.

I'm sure alot of people would be happy to help seeding updates, if the option were available and actually contributed to the update speed of those using the official game client (which it does not when using DHT on utorrent, essentially the official updater will never see those seeds as they cannot register on the main tracker due to not being a whitelisted client).