I think you simply skipped reading the article.
If you had read it, you would know that it could not have been published as a “Major update overview video”.
We’re announcing theses upcoming changes in advance to give you the opportunity to plan your research path in the game at the current time, with the knowledge of how the British ground forces tree will look in the near future!
Evil Thunder is where Gaijin makes the UK tree a full Commonwealth tree with over 10 lines, basically every style of vehicle from every corner of the globe, and everyone else just cries about it?
We’re announcing theses upcoming changes in advance to give you the opportunity to plan your research path in the game at the current time, with the knowledge of how the British ground forces tree will look in the near future!
Now they just need to finally fix the Centurion AVRE’s hull armor (reported). Add the Centurion Mk 5/2 with the APDS L28A1 in Br. 8.0 and replace the Centurion Mk10, giving it real mantlet armor (reported) and add the L52 (APDS M728). Review the add armor on absolutely all Challenger 2 models (TES and EOS with ERA equivalent to 1980s models).
Of course, there are countless more things to fix, but this is what I can think of in the first 10 seconds of thinking about serious errors.
Several tanks are changing lines, which may disrupt players who are researching them right now.
Announcing it in advance lets players plan their research routes before the changes where needed. Doing it this way is more fairer than just releasing it in a random minor update after the major without saying anything in advance.
I understand if you don’t play Britain or have already researched these ranks fully, these changes won’t apply to you. But for many it will matter.