> *Why the decision to remove the style module?
Maybe it was me. I don't know/remember. But I think I did restrict the list of themes to only ones I knew worked well.
Theme experimentation should be done at http://themes.tikiwiki.org
> *Can I access the style module some other way (user modules seem to be turned off also)
Try user preferences
> *Can an admin reset my style to the latest site default?
I could but I prefer to make sure you can fix.