Backstop like a service

Good day ,@garris . I thinking a lot about scenarios of using Backstopjs, and if someone start to use it in more complicated way there are a lot of questions how to do.
So, for example i have an idea to create tool which will make screenshots and add possibility to manage result of testing. But unfortunately i don\`t find easy way to do this stuff.
So lets imagine that i have 10 test. I run all of them. And show the result in browser. After this i want to approve one of them. I run approve, but report doesn`t updated and in browser i still see old report. So my next step is to run backstop test with filter just for this one and i do it. But in such case report will be rewrite, and i will see just one test. But i still have 10 tests and just one of them approved. How to manage all other?
After this scenario i feel that it will be greate if backstop test will return json as result of promise and in such case i will have possibility store all result in separate json file and update it or rewrite or something else. Or some other workaround to get result of test.