Tibalts Trickery , for example, arguably may be better used on your own spell rather than an opponents spell so you can potentially hit a monstrous creature or powerful instant/sorcery
What if you had a card that could turn +1/+1 counters into a token creature
The Indomitable I'll take a Coastal Piracy in the CZ
There's new Majespecter and Raidraptor support, and a bunch of new plant support - and for new archetypes, saddle up with Goblin Bikers
This ritual is capable of giving you 10 or more mana for just 1 if you can fill your graveyard in some way
I've had the most fun with this deck when using Human Torch as the primary Commander, and he's also the card I've struggled the most against, but each of the four Heroes is valuable in their own right, and the fact that all four are always in the deck means you're never far away from some game-changing plays