I think the journals were made for creators to talk about upcoming items or problems with uploads or take notes for them self. You could make yourself a Live Journal/Tumblre/Dream Width to show case/talk about sims stuff. Or upload something.
"I dream of a better tomorrow, where chickens can cross the road and not be questioned about their motives." - Unknown
What you say is true, however, an external thing would mean less integration with this site which would probably mean less traffic. I've tried creation, but I kinda doubt it's for me. My computer is really too slow to run Blender and coding gives me a headache. I've tried Career modding, but I eventually ran out of ideas/patience.
Journals where originally created for, well, creators only, and given the multitude of other blogging possibilities for normal users, it's currently not in my plans to do anything more on them. I've been toying with the idea of doing a deeper tumblr integration though.