I was willing to forgive the grey spandrel pending the balcony glass... but I must say now that a significant amount of it has been applied, the outcome is very disappointing.
The colouring of the panels is far too seafoam to give off the effect that was intended - and I genuinely believe that if the balconies hadn't been such seafoam, the sum of all parts would've come together quite nicely despite the light grey spandrel.
With apologies to
@bangkok for editing their photo, I threw together a quick example of what 'brighter' balcony glass could've come out as:
View attachment 322065
This shade is not without (plenty) precedent...
Exhibit on Bloor,
Casa II and III, and
Stanley on Church all have similar balcony glass, to name just a few.