Comparing apples to oranges usually gets you nowhere.
You are the builders, and you are also obligated not to simply accept everything as a [BU] promises. The development plan is open and visible to everyone and should be thoroughly checked before purchasing a plot of land. Especially by the builder!
And you don't need a lawyer for that, since the proportionality is such that one can expect from a builder a) see above b) to adapt various shades of red. After all, you don't build to have a red roof, but to have a home or retirement provision or investment. The roof and architectural style are adjusted to the development plan. The usability of the house is in no way restricted.