See, this is quite interesting for a lot of reasons.
Firstly, the maids are fearing Chloe for the reason they should've feared her all along; she has authority over them. But also, now that the other shoe has dropped, regardless of if you find it forgivable, their behavior is much more rational and functional than the head maid.
Second, we don't have any mention of Chloe considering forgiving them-though I would argue that if she wants to change herself, then it's mostly fair for her to give others the opportunity to do the same (not to mention old Chloe wronged at least one of the servants in the past).
And lastly...yeah. Making them recite their crimes is quite the remarkable power play. There's the sheer guilt and fear bringing the past up would cause, but also it makes everything far more grounded and made for a nice marker for the varying levels of bullying they all did.