I think that main deck shaddoll are balanced and their effective usage is very skillful part of the deck. Dracossack is now not a problem because 101 and castel didn't exist when dragon rulers were tier 1. Winda and construct made the broken deck even more broken. They are like Dracossack in dragon rulers.

Fire and earth fusion are very situational so they wouldn't play more than 1 of each. At 1, shaddolls will be still playable and they can still punish the opponent for using the extra deck, but not doing over and over again. If they were at 1, more decks will become playable, since they cannot drop another copy. Winda is mostly played at 2, while construct is played at 3. Most of the decks cannot handle multiple copies of them. Even if they ARE SENT to the graveyard they will just grab you another fusion spell from the graveyard. Since sending monsters to the Graveyard isn't a cost, the main deck monsters get their effects, which means whenever your fusion resolves(when using monsters from the hand or firld) you will will always go +0. Fusion mechanic makes the decks even better. However both winda and construct would be more balanced if they weren't fusions. Both winda and construct punish for playing the decks that special summon, which is more than 90 percent of all decks that are played competitively. Shaddolls suppose to punish the opponent for special summoning, but the deck itself is faster and can special summon more than any other deck in the format(except Burning abyss). Fusion summoning mechanics and one-sided effects of the fusion monsters.

Arg pale moon standard deck