I completely agree and even argue it a little. It is customary to use only checklists on my project, so this is a very relevant proposal for implementation. I think it's not difficult to implement. You can, for example, take the logic of creating a test suite and quick test cases without a modal window - this has already been implemented. Just put it in a separate button along with two available ones (Test suite and Test Case) and comb the logic (you can even simplify it most likely)