I'm talking about the actual use of the ability at the table being disruptive and slowing down play. Nothing about in-game fiction.
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.