Purposefully omitted anything that costs more than 6 (vara, etc) in order to keep the curve a little lower and to rarely have dead cards.
If you see a ton of aggro I could see the argument for fitting in any number of BSH.
The goal of the deck is to play feast caller or champion and either copy or recur them. They both typically 2 for 1 your opponent or win you the game if they don't die. Spot removal, storm, and looting help you get there.
Sideboard is there so you can tweak the numbers of a few cards, deck isn't perfectly refined yet, and depends on the meta you are facing