Hexproof was introduced in part because it makes more sense intuitively to cast spells to strengthen the creatures you summon instead of being unable to do so because of their aversion to magic
If you like Planechase, or just generally hijinks in your Magic games, Id recommend checking it out or come find me at MagicCon Chicago: Ill be playing it there all weekend
Aside from just boosting other Outlaws, Vihaan brings something new to Treasure decks, being able to weaponize your wealth
Untapping an artifact is usually more desirable than tapping one down, and scry is at least comparable to surveil, though usually worse
Mishras Workshop is, generally speaking, a stronger card than Ancient Tomb, but there are some hands that actually change that
(You may cast a spell for its freerunning cost if you dealt combat damage to a player this turn with an Assassin or commander.) Whenever Ezio deals combat damage to a player, you may pay if that player has 10 or less life