Aboshan dies easily for a six mana creature - that three toughness is below the threshold for red commons in the draft (Fiery Temper, Firebolt with flashback, Flame Burst with another Burst or Pardic Firecat in the yard, Acceptable Losses, Swirling Sandstorm, Kamahl's Sledge, Sonic Seizure, and Ember Shot will kill it), making it a little too fragile to survive in most instances
Thankfully, while its shocking that so many MTG cards are being banned so suddenly, there is a fairly simple explanation to it all
It may not be the sexy card, but it's the best one, I'm confident
Mercadia was not a particularly popular plane (nor was Mercadian Masques a popular set), but it seemed wrong not to make a nod to it in March of the Machine