As a side effect of Dynamax being implemented, Zygarde-Complete now utilizes Leftovers recovery as if it were in its base form on PS!. This actually makes quite a bit of a difference bulk wise, particularly on Dragon Dance sets, which utilize Substitute and Leftovers a lot. The difference is notable in this game: https://replay.pokemonshowdown.com/smogtours-gen7ubers-470407 , and whilst it did not really effect the outcome of the game it could come to a point where the Leftovers recovery does matter based on how often Zygarde can stay on the field. If this is intended in SS that's fine but the mechanic should at least be re-implemented in SM.