Themes

So then, a "session" theme then would let, for example, a teacher (who is not also the admin of the moodle site) to set how their page looks for all of its users? My understanding of the theme settings now is that only 2 options are now available:

Option 1: An admin sets the theme (lets say blue ocean) for the entire site
Option 2: An admin lets each user choose individually how they and only they see all pages. For example, if I am a student taking 3 different courses with 3 different teachers, I could choose to see all of those courses in standard white, but no one else would see the courses in standard white unless they too choose standard white as their theme?

Is this correct? And if yes, will there be an added feature soon that would allow teachers who are not admins to have different themes than other teachers or other admins for just their pages with an extension that they could control how the users of the pages they create see those pages? In my current teaching situation where I share a moodle site with some 40 different teachers we would like such freedom of design...We want our pages to look different from other teachers' pages, BUT we want to lock in the theme (not allow students, at least initially) to take off the theme. That is because some students in our context would get confused if their version of moodle looked different from the version the teacher was modeling.Yet we as teachers want to be able to diversify or to individualize our designs.