Having it built out of 20-centimeter sided blocks (with 1 meter as a starting option, and maybe even 10 cm for high-detail) would make it wastly more useful. For example, those could be useful for OpenStreetMap, a project everyone benefits of. Meanwhile, this will likely just disappear and just be written about as a footnote somewhere. Of course, the whole issue could be sidetracked if other primitives (with unconstrained sizes) were allowed/used.
This lack of detail in construction was always my main issue with Minecraft, and its large blockiness usually goes so far as to induce/exacerbate my motion sickness.
Speaking of OSM, they are currently taking the very easy-to-produce and simplistic parametric approximation approach through surveys, mainly via the StreetComplete app ("How many floors does this building have?", "Shape of the roof", etc.).
Also, and I really am compelled to say this, StreetComplete is one of the most functional and most logical complex android apps I have ever encountered. It really shows it is built by the users, for the users.