Right now, the System menu allows us the "Log Out" and "Exit Game" options.

I wonder why there is not a "Character Selection" option.

When I'd like to switch to a different character in the same world, I need to log out of the datacenter, log in again to the datacenter with "Start", and then select the character.

When I'd like to switch to a different character in the same world/datacenter, it is quite a long process, for something that can be shortened. And, I think, puts less stress on the datacenter itself as there will be no logout/login trip to it.

Maybe there are other technical reasons for not having it?