It is not clear to me from what was said in the video that they are ruling out the possibility of Warlock having a short rest recharge. In
this UA they no longer have a daily recharge, and the video explains their reasoning for going in that direction. That’s entirely different from saying that they are no longer considering short rest recharge as an option, if this UA doesn’t meet their satisfaction threshold.
This isn’t a semantic argument. I do not see the claim
@Mistwell said WotC made being made in this video.