Schedulable blocks

Use-case:
our pages stay almost the same the majority of the time. For example, we have a slider, promotions carousel, incentives, categories grid, testimonials, blog posts carousel, etc on our homepage. We rarely change that structure, instead a lot of our day to day work is to schedule updates, updates are not typically for all the page but just a section in a page. Here is a common scenario:
We have a new promotion, so for the next 2 weeks, we want to update the slider on the page. Here is what we do:

1. duplicate the whole page

2. update the slider with new images

3. schedule the page

What I think makes most sense is to build a page using "blocks". Blocks become one of the content models, you add a block, add a slider to it, and then put the block on a page or other pages. It makes the slider reusable and also schedulable. This way you schedule the content that is being changed not the whole page.

I am not aware if this functionality is already supported, please excuse me if I am missing anything. Glad to provide more information.