This incident made me think that the hackers planned to hijack some popular extension. this would make the more damage. My (unpopular) opinion is that GNOME should see what are the most used extensions, accept that people want those feature and bring those features into GNOME or make those official extension and not third party, so you at least control what most people would install.
GNOME has been nuking features for a while, recommending people to go and install extensions. Extensions work by monkey-patching and once you have a critical mass of them, you're guaranteed to run into some glitches where one monkey-patch messes up the other. I like the KDE approach more where features are actually baked into the DE. It's much easier to reproduce bugs and fix bugs that can depend on different feature…
I am a KDE user and to be fair during KDE4 days ,Plasma had a maintainer with big ego that had a similar mentality with GNOME devs, we could not get a patch merged in to hide the Cachew thingy. Makes me wonder if all this GNOME vision of removing non default options is just one guy with big ego and lot of influence