I think the facade is made of limestone; or perhaps some sort of porous stone. The ‘blotchy’ coloration of the stone seems to be feature of limestone (or some other porous stone) on many other projects I have noticed recently.
Blotchy fine, more uniform in surface coloration - better IMHO. 
I am hoping that it is only a result of recent moisture retention from rain; and the coloraton completely ‘evens out’ during long dry spells in the weather. Some folks have commented that It looks a bit CACA when the stone is all blotchy or mottled in coloration. 
Once I started noticing this; It seems I am seeing it everywhere… 