The asari to me are a glaring example of something seriously fucking up with the toolset during production, or a pipeline issue.
Also 5+ year dev time? It is more than the Asari. If you look at the Salarians, Turians, Krogan, and Humans, you see a lot of asset reuse especially for NPC's. You can see the exact asset for Suvi with different colored hair etc. Identical body types with changed face only.
Maybe these were done early on, and just carried forward? For example, the Tempest docking sequence with the Nexus. That just always screams so low quality to me. Vortex nightclub so limited, as is the cultural center.