Everyone should cancel their Subscription for 1 month. You'll still be able to play, but this will send a clear message to ZOS, that you can't screw over your long time supporters / Consumers and expect to get away with it.
For the record, I could give a rats ass about some vanity pet.
What I care about is a company that intentionally creates policies/content intentionally designed to screw over their long time supporters and consumers while rewarding new players to the game.
(Because it couldn't be anything else, unless ZOS is incompetent, which they obviously are not, So it MUST have been 100% intentional.)
This can not stand, and everyone needs to show ZOS they can not get away with it. If only on principle.