Thak you for the cool review. I have this set too and it's great.
I would like to share with you my opinion. The idea of the Architecture series is not to build 100% realistic replicas of the buildings but to reflect an essence of them from the artistic and architectural point of view using only basic, standard LEGO bricks, and I think it's very good idea which makes Series distinguished and exclusive. Slovenian architect did it really good in this set.
What about a clock brick. I don't know what to think about it. LEGO has had this brick with clock from many years ago and it shows a clock, so why not use it in this set? From the other hand it slightly provides a kind of dissonance to the rest of the project. However, all in all I think it is a good idea to use it and I can't find better solution.