That's because this is, like a commentator below said, a mix of aesthetics, politics, and technique. As an architect and software developer I will bet my hat

That's because this is, like a commentator below said, a mix of aesthetics, politics, and technique. As an architect and software developer I will bet my hat that the architects knew exactly what was going on, but said that it was based on the GoL precisely because it would pass the budget. I wouldn't be surprised if it started out with the GoL, but, thanks to budget reasons, they were forced to fabricate multiple identical panels rather than a total unique facade, and switched to a CA. Fabricating/plasma cutting such a facade would be hugely pricey and the only thing that would let it survive against a bottom line budget is a political reason - aka a talking point.