I have a character on an NA DC to play with friends who are over there, and every time I switch back to my main on EU it catches me off guard. I click on start, I realise I need to switch DC, I back out of start, I go into data centre, I change it, I go back...
I've also logged in on the wrong character because I wasn't paying much attention, extending the process further. I'm also used to switching DCs within regions for statics, which is done from the character select screen, so now that's another way my muscle memory can trick me when I want to switch DC to my NA character.
It's tedious and unintuitive, especially now we can DC travel across regions from the character selection screen. It seems like it must be possible because of this, so would it ever be considered?