Really don't think it's going to have a huge impact on most areas in Florida. Most everything that can be designated as historical, has, and has been protected for a while. They really can't just protect everything in the state, since somebody owns it, and isn't going to limit their own use of the land, or future sales. Bad for growth and development, not just the hobby. Would be tough to put in a new road, strip mall, attraction, or build new homes, if there was a protected sit in the middle of it. Construction means digging, it wouldn't just stop us, but everything else.
If you own property, it's yours. If there was some archaeological/historical significance, you would have known by now.