The absence of ready action is really bizarre for me.
While I could at least understand (if definitely NOT agree with) an argument for being wary of adding "pop-up reactions" since "they would break the flow of the action" (and we could have a long discussion about this anyway, since it's not really clear how injecting more player inputs in the queue of "watching the fight unfold by itself" would be a bad thing) there would be literally NO downside on having ready actions in the game.