Heyo, I recently started using Aurora and I really enjoy it, makes everything much prettier to look at.
One thing that bothers me though is that I like the default Achievement pop-up window (the one you get when you complete an achievement) and I have not found a way to show the default one instead of the Aurora version.
If I remove AddOns/Aurora/AddOns/Blizzard_AchievementUI.lua from the folder I revert the look of the Achievement frame but the Achievement pop-up remains the same.