Developer here wanting to create a useful tool and seeking opinions

Hey,

as the title suggests, I want to create a useful SEO tool and am interested in your opinions.

Let's say you found a good topic, "best paper cups for hot drinks" for ex.

Would you find this useful? A tool that analyzes the top 10 search results and lets you know: Their type (article, shopping, Quora, forum, etc.), their word counts, their common words, and the amount of images and their alt tags.

I know that's roughly what I do when deciding on a topic and could use a tool for that, what do you think?