Other than the recent changes detailed in Live Update 1.15.1, there shouldn't be any other changes that would make her feel slower than usual. I'll certainly note down the concerns though and keep an eye out for similar reports from players.
Thank you for listening. I know it's not the biggest issue the game has, but the Peacekeeper's light attacks do seem slower than what they used to be, which is not good for an assassin character. If we could just have her light attacks flow a little faster, I think that would be better. Not guaranteed hits like Shinobi or Warden, but still, just a bit more speed to them would be nice. I wasn't kidding when I said her light attacks were being out-paced by slower characters. Even if it's just her second light being faster, I think it would help. Sort of a slow open, quick follow-up thing.