I said automatically - voting comments still requires there be one at least 15 minutes old with no self vote. In practice that is likely to be easy to accomplish, but in practice a huge account that engages in that behavior would also likely result in other users setting up a script to try to front run the self vote on the comment. Either way, it isn't automatic like the current setup is (you are guaranteed a minimum of 100% return on a 0 minute self vote now), and it also won't result in greater than 100% ROI.
Ultimately I think the flaw in the way you have been looking at this whole thing is you are focusing on what accounts will lose without looking at what share of the (increased) reward pool they gain back. I think it is very clear the highest SP accounts will lose something, and the lowest SP accounts will gain something in net reward. I don't think it is possible to get exact figures in advance but there is no way this is not a net gain for the under 500 SP accounts.
This is well within our scripting capabilities. You still have to make the comments, but making comments is easier than making posts.
There's more than one way to look at losing. Both you and Paula have decided to look at what current posts will gain or lose rather than looking at how much of your stake reward will go to places you didn't choose if you vote naively. That's way more important to me. If the system is burning 7% of total vote value that means a lot to me as a voter.