Kaladesh had just a touch of typal, focusing on a bunch of creature types that didn't have a lot of support: Aetherborn, Artificers, Assembly-Workers, Dwarves, Servos, and Thopters
A number of years back, I used to run a weekly Magic design seminar in R&D where I would talk about various topics
Ideally, you want a wide mix of cards in every box so that Timmy/Tammy doesnt feel like he should have just dropped his money at Wal-Mart on two packs of Return to Ravnica and gotten some rares with a chance at a planeswalker
13 of them are guaranteed Magic cards, while the other two are an art card and a token/ad card
Commander Marchesa, the Black Rose Dethrone (Whenever this creature attacks the player with the most life or tied for most life, put a +1/+1 counter on it.) Other creatures you control have dethrone
Not only that, it can create a little Mite token as well