A few old dungeons boss redesigns are for the better, but most of them just nerf bosses outright.
Like final boss of Stone Vigil had aoes that left persistent ice puddles, but no, apparently that's too hard somehow. Now they are just standard aoes.
Second boss in Keeper of the Lake also had more pesistent puddles, but now they disappear after a few seconds.
Edit: meant it as a reply to KageTokage, but oh well.