What was shaping up to be the most competitive deck has arguably become the worst of the four, despite a high reprint value, and the four decks in general are split by a rather large power gap
Once per turn: You can change this card to face-down Defense Position
Decks that want to draw cards with Fact or Fiction are very unlikely to also be able to optimally use a Skullclamp, decks that have the mana to bust out a five or more mana draw spell are similarly unlikely to also want to use the economic but slow Ancestral Visions
However, given the popularity of Chip N Dale in general, I guess I shouldnt have been all that surprised
While Proposal is the only one that could possibly be 93/94 legal, Splendid Genesis and Fraternal Exaltation arguably fits under a broader old school umbrella (being "Premodern" and what-not)
Not only do cards like Snickering Squirrel make this possible, Sword of Dungeons & Dragons exists