I think retuning is underway as we speak. And good on SoundMagic for doing this!
Nice that a retuning is happening! Hopefully Soundmagic will revise their HP100/HP150 headphones with a similar build quality to the P55 while maintaining the original sound signature.
The HP100/HP150's Yoke/Driver support is a massive weak spot on those, mine broke after barely dropping the can. There are multiple reports with similar broken yoke's, so watch out with throwing your HP100/150 into your bag carelessly.