This format is all about who has the better battlefield presence, and youd be surprised at how both Stealth Mission and Courage in Crisis can provide value while also giving you the better battlefield presence
But if it's strategy and silly fun you're after, it's not a bad choice
In short, Tarkir is a bad format for midrange
basically every deck runs some amount of recursion like Sun Titan and Animate Dead, but also some of the most popular decks in the format are focused on Graveyard strategies (Muldrotha, the Gravetide)
In addition to this army of massive creatures, the deck features a number of utility spells including mana rocks, numerous removal spells, ramp spells, counter effects, etc
All the other pre-cons have multiple board wipes, which makes going wide the worst strategy, so, better safe than sorry