Ha. In what way have I been inconsiderate?

You just pointed out the solution yourself. Eventually, the "new" feed will have to either be filtered based on user preferences, or by some other factor.

For some unknown reason, you decided that if steemit only has 3 users allowed to post, then the problem of too many posts will be solved.
Even if you were to have a minimum balance, it doesn't stop the issue. Eventually there would be a mountain of people with the minimum balance, and the site would slow down again. And again. It isn't a solution. Then you would have to just silence more people by raising the minimum again. And so on.
Your solution Does Not Work.

But with your last comment, we get to the real root of the problem. "I know whats good about the site and I know what isnt."
Ego. Plain and simple. And my response, is that no, you aren't God's gift to steemit, regardless of what you may think.