Takahashi's looked just as young if not more than Tadano. Plus they looked like boys. And you forgot to mention the deformed legs and the lovely 5 meter mouths and his noses were way worse as well...
They simply should have asked Tadano from the start giving her the direction they gave to Sakou. Sakou's rough parts were due to the fact this was her first design job. Tadano could have done a nice etheral style they initially wanted a lot better. With nice proportions and eyes. Once Yukie was out they could have tried Tadano, but no we had to suffer through Takahashi. If she was brought back for s 3 she might have tried to modify the s1-2 designs.
They simply should have asked Tadano from the start giving her the direction they gave to Sakou. Sakou's rough parts were due to the fact this was her first design job. Tadano could have done a nice etheral style they initially wanted a lot better. With nice proportions and eyes. Once Yukie was out they could have tried Tadano, but no we had to suffer through Takahashi. If she was brought back for s 3 she might have tried to modify the s1-2 designs.