He didn't mention if it was all monsters, most monsters, some monsters or what. Or how effective they'd be. Or what you'd need to roll to recharge them (like on a 5-6 on a 1d6, if a Critical recharges them, or if they recharge when bloodied).You're right that was merely implied by Crawford saying that's what the monsters get. We shall see, but I think it's a fair assumption.
But they did make pretty certain what they were taking away from the monsters without giving us anything to test in its absence.
They shouldn't have even addressed it was a thing until they had something ready to try out with it.