I think a good compromise would be to have an option for lower res packs, but they would have to be reviewed by an admin or something, so that spammers couldn't flood the site with packs that they didn't take seriously. That may not be the best method to review submissions, but I would hate to see a good texture pack get taken down, or never get uploaded because there is a danger of spammers abusing the rules. As some people have mentioned, perhaps an amendment to the rule may also be better than getting rid of it all together.
