To be fair, they did indicate they want to make sure their solutions are viable before they turn off access to these addons. The problem I have, though, is that I don’t trust them to be able to do it.
If they had allowed Cooldown Manager, for example, to cook–to get more player feedback on it, to run it through the gambit, to be reactive and communicative about it with the community, to work with members of the addon community to get it right, THEN released it and it turned out be brilliantly customizable and able to replace existing addons, the tone of these threads would be wildly different. People might actually trust that Blizzard can and will get the job done right.
But they didn’t. Cooldown Manager is insufficient in so many ways that I don’t know of anyone using it.