The All Blacks had two players sin-binned during the game and two players - Sam Cane and Malakai Fekitoa - have been cited for dangerous tackles.
A number of Irish reports described the All Blacks performance as brutal.
In his BBC column Guscott says referees need to look harder at New Zealand.
"World champions New Zealand play everything at an incredible intensity. They understand the laws of the game, where the boundaries are and how the referee might react. They use it to their advantage.