All For One’s narration confirms that Rivet Stab’s been activated together with “auto tracking” (whether or not this is a feature of the quirk is not quite explained, however) as a necessary measure to lessen the strain on Shigaraki’s body and mind. There was no indication that it was even capable of this kind of usage when All For One used it in the series previously, so there’s a good chance that all of the other previous quirks will have additional boosts as well.
But what do you think? Curious to see how All For One’s various quirks will be revealed and changed through Tomura Shigaraki? Let us know your thoughts in the comments or you can even reach out to me directly about all things animated and other cool stuff @Valdezology on Twitter!