Yeah - but I don't think that's out of line with Scott's argument - in fact, doesn't he say that himself? The argument is that the alienation by force of Maori land was neither (1) inevitable nor (2) progressive. It seems that the ambivalence of the Crown is one crucial reason why it wasn't inevitable. It seems hard to believe Maori could have held out indefinitely militarily against the full force of a determined British Empire. But that's not what they faced. It's much less of a stretch to think of a counterfactual in which a few battles went differently, settlers were spooked and the flow from the mother country slowed down and made do with the existing enclaves.
At the time of the Waikato war European and Maori populations were evenly balanced, although Maori were declining. The wars were nothing like two sided struggles between Maori as a whole and the Crown - rather they were local battles with shifting tribal alliances, with Maori on both sides. The King movement centred on the Waikato was about uniting the tribes and presented the biggest threat to the colonies. Mostly Maori did not want pakeha (Europeans) to leave the islands, because they wanted to trade. And because Maori were not politically unified, within the dynamic of inter-tribal competition advantage could be got from alliance and trade with the colonies, so there were always Maori on both sides.
At the same time, there were millenarian religious movements sweeping through the islands with the potential to galvanise resistance along different lines. For example, Pai Mariri - http://en.wikipedia.org/wiki/Pai_Marire. The later wars involved prophet-led guerillas, and seriously freaked out the colonists. Te Kooti's War is a pretty incredible story, starting with an escape from an island prison 800 kilometres from the mainland. http://en.wikipedia.org/wiki/Te_Kooti%27s_War These things could have worked out differently.
Mike