Good points and thanks for the chart. Interesting.
For shits and grins, we'll also calculate without his self votes and include that rep calculation. In retrospect, that's what we should have been betting on.
Now, I do understand some potential cons if the rep system is modified to only depend on rshares due to attacks against the Steem users experience from outside saboteurs.
Maybe, a more conservative solution would be once we deem criteria in which an account is established as trusted that downvotes will be able to affect higher rep users as well.
Perhaps, a few metrics to consider would be diversity of incoming and outgoing votes and community interaction to name a couple.
The rep system should be revised so it will be more difficult to game. I think it's possible but that's above my pay grade. ;)
I think it should be an actual rating system like yelp, amazon, and almost everything. Any weight given to stake should be capped.