Who is this a problem for? It's going to improve search results because now SEO gamers have less data to work off of. If you're a website, you should know damn well what keywords your website attracts... and you shouldn't be tweaking things around just to trick Google into sending you more traffic.

Now web sites can focus on creating content, and google can focus on creating good search. Both parties will benefit at the cost of spammy SEO gaming websites, who are now blind and will be pushed to the bottom.