The bad architecture of the GNOME shell does not give me trust in the competence of the GNOME shell team (maybe they fix parts of it in GHOME4), the poor GTK story is also a bad point, arrogant developers, designers and community is also a bad point. Last time I checked they did not have real usability/UX studies except of some super old student homework projects so they imposed their concepts without real data to back it, so IMO without GNOME beeing the default on most distributions it would not have the share it has.
But if you like it then is great, I don't want to switch anyone to some better DE, I just want to explain that the reason I dislike the project is not about the padding or the GUI look and feel, on short I dislike the project because of their philosophy and bad developers/designers attitude and bad architecture.