I like it also because it flies, helping to trigger anything from Chivalric Alliance to strong equipment triggers, with less risk
This is less a payoff than a necessity, but aggro decks are very vulnerable to board wipes
Its a big creature with reach, plus it ramps you and fixes your mana
A great example being Faerie Mastermind, who can draw you cards but also wear auras and equipment or trigger Coastal Piracy effects to draw even more cards
However, with the brewmaster in play you food tokens get all activated abilities of creature cards exiled with the Brewmaster
This card retains the same effects as its earlier editions, with the enchantment allowing players to cast spells from their hand without any mana costs, meaning that high mana cards could be played with little effect on the preservation of mana