Maybe this has been covered, but was Ady’s “I’m gonna delete the AT STs” just him teasing us?
If the CG wasn’t going to work he was going to delete the original from the one shot you can see it in. Once it looked like it was going to work, he continued the story of removing the one, especially after the uproar he was getting. The plan was to never even hint at them until release, but after one of the delays he decided to release a teaser video including them.