The sheer quality of writing in my senior thesis is decent, but the project didn't really require enough original research. I feel that it would be taken as seriously. Also, the deficiency that I am most aware of, and self-conscious about, is that I only really spent a year in my undergrad history program. I started as a music education major and when I finally made the switch I was able to load up classes and finish my BA in History in a year and a summer. So I do feel that I have a decided disadvantage when compared to other applicants.
I wouldn't be throwing money away on this online MA because I will have a tuition waiver from work. My main question might not even be if it will benefit my future PhD application but whether it will actually hinder it. Would an admissions committee look down so much on that MA that I would be thrown from the stack just for that?