Moved to Suggestions and Feedback.
As for reducing the number of "This" comments, if a comment consists entirely of "This x10000" or "This so much" or "I agree x100", then you should report it, and we'll infract for Minor Spam. If it is like "This so much. I agree because XYZ", and they go into a constructive post (at least a sentence or two), it's fine. The word "This" or "I agree" doesn't make a post bad. When a post consists mostly of "THIS ^^^^^^", it is bad.