Jefe Bergenstein
Legend
I'm talking about the actual use of the ability at the table being disruptive and slowing down play. Nothing about in-game fiction.But the point is, the character does not make the decision to use it. The character does nothing. The concealed assassin is about to snipe the lucky character with their crossbow when a flock of birds suddenly flies up disrupting their aim.
Expending a resource to force a reroll is more powerful than expending a resource to impose disadvantage. No one is going to make a monster reroll a 4. But you might spend that resource when you were attacked when the roll is still unknown. Because it will end up being a pain in the ass with timing, it will just end up being more powerful than the actual ability is supposed to be.