Good post!
I was one of the ones that was trying to get a discussion going about improving Hive.
KE was part of that discussion.

One of the topics was that reputation level of users isn't really helpful to determine users that are of added value to Hive. Although it allow us to see if a user is downvoted a lot, a high number doesn't mean that the user is a role model.

It would be nice if we could take some other numbers into account to determine whether a Hiver adds value to the platform.
KE is one of them, but indeed as you already mentioned, there is some discussion about it. People that extract Hive could have been doing this for good reasons and they might still be of added value to the Hive.

Commenting is another figure to look at. Nice to see the stats you have collected.
It's good to see the engagement on the Hive blockchain.
Although we do have to look critically at some numbers too. As you mentioned, some are from bots, but I also see a lot of low effort human interaction.
As others already have stated in the comments here; there are also a lot of 'Great post' replies.
Apart from that we also have to note that the microblogging initiatives (Threads, Waves, Snaps, ...) use a blog as a container for all the microblogs from users, which are actually comments.
Some people that are active on these platforms are actually not engaging, but microblogging their own content.
I've been using Peakd Snaps myself as well. I like posting one or two Snaps a day and interact with the people that react to that. And I also react to snaps from others. The number of comments I make on a day increased a lot after I started using Snaps.
And they aren't necessarily really engaging like long form comments (like this one 😂).

For the @topcomment curation service I'm running I run a scheduled script that excludes short comments, comments from microblogging platforms, automated bot comments and comments of daily prompt blogs (because in this last case people only share their own story).

It would be cool if more information about our behavior on Hive could be reflected in a number, more numbers or something like a account health indicator next to the Hive usernames, replacing the current rep score.