Red increasingly cares about discarding cards and casting spells from exile, making this a potent draw engine with cards like Inti, Seneschal of the Sun and Faldorn, Dread Wolf Herald
This recent addition has lowered the sword to $22, though it is gradually climbing back up
Just look at it from the publisher, Wizards of the Coast, point of view they want to attract fans from other franchises (hence the crossover), and still need to make the set fun, exciting, and balanced right from turn one
But the last 15 years haven't been especially kind to Jace, with its downfall being sealed when it was finally unbanned in Modern only to see essentially zero play in the format
The team was seeing companion decks have too high win rates, and they wanted to work on making sure things werent too repetitive