The laws haven't changed in the recent past; the thresholds, multipliers, percentages, etc. have been adjusted from time-to-time.... No wonder this country is the way it is with stupid laws like that. The law should not just change because your brother is giving you a site instead of your father. What difference does it make??!
As highlighted by Vanilla above, these issues can arise if there has been inadequate tax-planning or a lack of foresight when family businesses or property are transferred through the generations.