I can only comment on fit as I did not pull the trigger on them:
I have a wide-ish forefoot, regular heel, and low arch. I felt that for me, the new phantom tech was too loose in the heel, little too low volume in the forefoot, and a bit less wide toebox than what you would expect from Scarpa. I have not been able to compare with the previous PT model (trying to score a couple discounted pairs to try on as they are no longer in stores around me), but I can compare with the old Mont Blanc GTX (not Pro) and La Sportiva's line of ice boots. The Mont Blanc GTX was a pretty great fit for me, I was expecting something similar from these but was let down. Most Scarpa rock shoes also fit me well. Compared to the average la sportiva fit, the new PT feels just a tad wider but fairly similar in volume and little sloppier in the heel.
From what little reviews there are online, I saw a few agreeing sentiments on fit - but hey YMMV, I may just have a weird or hypersentive foot. They feel super light though, and I was looking forward to these because of the more durable sole and normal lacing/zipper, but I'm still on the hunt.