First, you can cut the infinite damage combo by dropping Morophon, the Boundless, Essence Sliver, and Syphon Sliver
You can potentially offset this complexity by running Far Traveler as a Background, but then you lose out on access to a second color for what amounts to a worse version of what Brago, King Eternal can do
Happy brewing in Bloomburrow , and may your work and play mix most wonderfully
Maha makes all of your opponents creatures have Toughness one, and Night of Souls Betrayal gives all creatures -1/-1 as long as it sticks around
While they are still slightly thicker than your average USPCC produced deck, they don't feel quite as noticeably thick as a B9 deck, and this gives them a thickness that is more similar to a standard USPCC produced deck, and makes them more pleasant to use if you're used to handling USPCC produced decks
Players are always finding new ways to break this colorless creature, although it doesnt usually stay broken for long, and feels really well balanced