Not only that, but it has early game versatility because you can tap it to add one mana should you be running short, want to ramp quickly to a huge beast or, lets face it, get Esikas Chariot out as soon as possible
Zombies have tons of support and often interact with the graveyard, so the build paths quite clear
I feel like this is one of the most well-realized precon decks ever out of the box, so you dont necessarily need to change 30% of the cards straight away even if I told you to jam a few games, talk with your group about the power level you want, and then decide where you want to land on the scale between AFR Set Constructed Venture Tribal and Legacy Reanimator Combo
On the other hand, notice that the uncommon Enchanting Tales and about 70% of the rares arent worth much
Just a dork that can be a 3/2 flier for two or a 2/1 should you not have a card to spare is powerful and versatile