What if we could see the word count, character count and how long it would take to read what we are posting? Isn't that very interesting?
I appreciate your time spent for this userscript but about its use case, I don't find it interesting as I don't have need of knowing how many characters of my post, how many words a post has, and how long does it take me to read my post. It's all unnecessary need, at least with me.
Posts can be helpful and quality even they have only some words. Lengthy posts can be useless and they are spam as what they are.
A professional spammer can write a very long post - much longer than one or two lines - but it is still a spam post. An experiment.