The only complaints that I've run into that I see merit in for some people is the fact that for some of these second MPs, most of them would be elected in second place, so you elect the first-place candidate and the second-place candidate from each district. In a small minority of districts in the simulation I provided in my submission, it was 13% of the candidates who would have been elected in third place or lower. Some people object to the idea of having those runner-up candidates elected. Personally, I think the objection is unwarranted. Those candidates would be top performers for their party, and whether you elect them in third place in a district or you put them on a list, in an MMP system, I don't think they have any more legitimacy on the list in MMP.
On September 29th, 2016. See this statement in context.