I read your thesis on Benefits and Aspects of Dialogues in College Students' Dialogue Journal Writing with great interest. And I think students can benefit from the method for two reasons.
First of all, students will get used to writing in their target language through sustained dialogue with the instructor. In my experience, there's no shortcut to learning English. And especially to improve writing skills it takes a lot of time and patience as well as hardworking.
In Korean society, however, most students don't feel the need to write in English unless they have a writing assignment.