Sounds interesting and I very much appreciate your thoughts, but I don't think that the solution would be very user-friendly. There are already many questionmarks for new users when using STEEMIT.
And for STEEM(IT) to go mainstream - it has to be as simple as possible.
Also - this won't help with cycle-jerk votes from users who upvotes each other - most of the time with a huge stake.
To be honest - the biggest problem right now are our human flaws. On the one hand we want fairness and give people what they deserve, but on the other hand we want to support our friends, colleagues and family.
And why would I want to cap the amount that my family-member can make on STEEM? Wouldn't make any sense for me. Even if it were just a simple post.
STEEMIT has to decide what it wants to be: social network? Medium alternative? Reddit alternative?
All those things have different priorities when upvoting something.
Yeah, we won't be able to save the system from abusive users who do things on purpose, the idea of my system would be to make people think about the rewards they give. Like I mentioned to another user, if we can reach 10% of the users with that, that'd be a huge success already.
About the usability, I agree that we have to make it as easy to use as possible for new users. It wouldn't be much of a problem to hide this bar for users with less than x VP and enable it with a explanation as soon as they reach it.