Well, to be fair, they did announce #SomeChanges approach with Wrath on day 1. https://worldofwarcraft.blizzard.com/en-us/news/23813563/developer-update-a-look-at-whats-ahead-for-wrath-of-the-lich-king-classic
And they did talk quite a bit about other balanacing.
Not a Goal – Embark on an effort to provide ongoing balance to all classes phase over phase.