There seem to be plenty of links to discussions in the bug tracker to support this article.
E.g., the attitude of the dev in response to reasonable argument from his users in https://bugzilla.redhat.com/show_bug.cgi?id=485846 is pretty much "I'm not changing it, just because". That would make me rant and foam at the mouth because a reasoned approach patently failed in this case.
That "X always implies Y and I don't care if your use-case disagrees" attitude is poisonous and a project that doesn't consider it so is a train wreck waiting to happen.
The developers never promised to provide a stable theme API, even selecting themes as a user is basically only possible via "gnome-tweak-tool", so this had "alpha code" written all over it from the beginning.
E.g., the attitude of the dev in response to reasonable argument from his users in https://bugzilla.redhat.com/show_bug.cgi?id=485846 is pretty much "I'm not changing it, just because". That would make me rant and foam at the mouth because a reasoned approach patently failed in this case.
Even this case isn't as clear-cut as you make it out to be, especially if you look at comment #14.