By incorporating land covenants that dictate all sorts of aspects of build type and style, landscaping, and even placement of objects (caravans; solar panels; clotheslines, TV dishes etc) the intention is to keep the area tidy (and exclusive).
But after the developer has gone - the only enforcers of the covenants are the residents. How is that going to help neighbourly relations and community feelings?
Another negative and potentially unforeseen impact of a restrictive land covenant - Stuff 6-Feb-2018 - this time relating to the size of a new dwelling emplaced on the parcel being created.
Reading through the comments, and looking at the images, it would appear that the over-whelming public opinion is that the "rule" has overtaken "reality". That is, this type of attractive smaller house design may well be a better asset in a new subdivision compared with many alternative 'cheap and nasty boxes' that would comply.