You will be able to interact with landfill like any other entity. It will not be tied to the super force building feature. You can see this in the second to last gif where landfill is manually removed by tile and also by deconstruction planner. They always wanted to add the option to remove landfill but the extra work it would take to fix the code to make it possible made them put it lower on the priority list, but with the introduction of super force building they were kind of forced to address the landfill problem.
That’s a good one! An alternative that does the same but gives you a bit more time to correct the issue before you run out of fuel is to use a chest to buffer the belt. Set up the speaker to alert when the chest is no longer full (indicating belt is no longer saturated).
This solves some of the most frustrating limitations of 1.1. These updates just keep getting more and more exciting, and we still have quite a while until release.