The chances of your moves having no effect whatsoever are slim and are tied to certain types like Normal and Fighting against Ghost types, Electric against ground types, and Dragon against Fairy types, for example
Turn over turn, Weeping Angel will suffer from the drawback of the opponent being able to turn it off as a blocker by casting creature spells, but this wont always be an option, and through discard or counterspells, there are tools for Dimir decks to save Weeping Angel from opposing removal, all while being able to attack the opponent or their planeswalkers with a vigilant creature that is quite unpleasant to block
2023-06-16 An ability that triggers "whenever you cast a historic spell" doesn't trigger if a historic card is put onto the battlefield without being cast
While I personally find Atraxa a bit dull, I understand why she's so popular, and I know she deserves no less than A Tier
The deck also features a ton of different creatures with anthem effects for your zombies, which can make your zombie army and tokens incredibly powerful (for example Cemetery Reaper, Death Baron, Tomb Tyrant, Lord of the Accursed, Bladestitched Skaab, and more) to easily overwhelm your opponents
You can counter a counterspell