I don't know if fair use laws will last, but I hope they do, and definitely disagree that sharing revenue would somehow be ideal.

I've read criticism of media I've never even heard of (and learned some insightful things), so clearly the original IP isn't always the pull, and even if it was I don't understand how talking about something suddenly means I need to pay the person who owns the intellectual property of the thing I'm talking about. I think it would make criticism less likely and put us in an even worse situation than today, when large corporations often use the DMCA to take down clearly fair-use criticism. Just a further stifling of speech.

Also, fair use has been around since the eighteenth century, even if in the US the US 1976 Copyright Act made fair use statutory.