This question is wired to the topic: https://meta.askubuntu.com/questions/17257/when-to-add-another-answer-instead-of-updating-my-current-one - but is slightly different. Here is the story:

Few days ago I've created an answer, that provides working solution, to the question: How to https://askubuntu.com/questions/955038/change-the-display-scaling-on-the-fly? There was posted also an answer, that was accepted. I liked the idea. The suggested approach looks really light and I already tested it. It works nice, but the answer is in low quality. 

So, I want to write a comprehensive answer, but I can't make a decision about the inner question: Should the lazy author of the accepted answer earn benefits of my effort or should I create a separate answer?

What should be the principal decision model within cases as this?