Maintenance for the week of October 12:
• PC/Mac: NA and EU megaservers for maintenance – October 12, 6:00AM EDT (10:00 UTC) – 8:00AM EDT (12:00 UTC)
• Xbox One: NA and EU megaservers for maintenance – October 14, 6:00AM EDT (10:00 UTC) – 9:00AM EDT (13:00 UTC)
• PlayStation®4: NA and EU megaservers for maintenance – October 14, 6:00AM EDT (10:00 UTC) – 9:00AM EDT (13:00 UTC)
Todays Patch
Well I think you did well starting the EU Maintenance at 3BST however I would still advice EU Maintenance to happen mid week at mid day is a good time.
After you finished the maintenance and patching you added a authorization check on the accounts which is a good idea but you don't want that on when the server is coming back up at EU prime time you overloaded your email servers which is the fault of the time you choose to add that feature in.
The patch does not seem to have been tested well enough as you have brought it out it is stopping hundreds of players from even connecting. It is kicking players when the teleport using fast travel or way shrines.
A large amount of people have lost there guilds and friends list some even there banks.
Even worse after doing this to the EU Server you have gone ahead and done it on the NA Server now ........
Rookie Mistakes
But other than the above you have done well with your launch, just need more communication and more testing before you bring out a new build.