If you could assign a template to the login screen and turn the data that is displayed into modules, and have a mini version of the template config and module positioning in jopensim that would allow for full customization of the login screen.
And by also allowing to place modules from outside of jopensim that would be extremely cool ..
As we know, with "advanced CSS skills" almost everything is possible in that case. I just try to find an easy way in administration, so users without it can also benefit from these possibilities