The Royal Commission's report, completed in December 1986, was surprisingly radical. It recommended New Zealand adopt the German-style mixed member proportional representation (MMP) system, in which each elector would get two votes: one for an electorate Member of Parliament (MP) and one for a party.
The size of Parliament would increase to 120 MPs: half would be elected in single-member constituencies (as before); the other half would be selected from party lists so that, in general, each party's share of all 120 seats would correspond to its share of the overall vote.
As the Royal Commission and pro-MMP campaigners had predicted, Parliament has certainly become more diverse and representative of modern New Zealand society. Following the 2005 election, there were 39 women, 21 Māori, 4 Pacific and 2 Asian MPs among Parliament's 121 members. The 2020 election returned 58 women (48% of MPs), 25 Māori, 11 Pacific and 8 Asian MPs among 120 members.