For us this change has killed the usage of the product.
We heavily used sections as part of our agile process representing versions of modules. The section contained information on the version and i could refernse it from other tasks by sending a link to the section. Once completed the tasks in the section - i would delete the section.
ALL these good things are now gone. Can not understand how your product manager designed this change. All my tasks are full of broken links to section that no longer exist.
I can not add description to section
I can not create a link to a section
I can not delete the section without deleting the tasks (even if complete.
I can not believe how you have messed up a cool product like you had. For us it is a game over change.