Once a player is chosen, it's too late for other players to respond by casting spells
Sure, you are compensated in due course with treasure and you might have a Halvar to find but Gift isn't exciting outside of constructed combo decks so it is not looking good for this
Jeskai control also puts MH3's Wrath of the Skies on display, as a cheap way to wipe a board full of creatures, often for the low price of two mana - an effect that frequently cost at least 4 mana in previous control strategies
At the time of writing, this Enchanted image of Mickey Mouse in his heroic stance is shown as having a market value of $119.82 USD on TCGPlayer
Reanimation needs to be done early to be having the most advantage from your stupid fatty, by the time you can be doing this your opponent can have easily hard cast things that don't look to bad compared to what you plan to cheat down
Most real-world games have finite limits on their complexity, such as the size of a game board