Some of the people who I've spoken to with the new motors said they're fine. No vibrations what so ever. I'm just putting the pieces together in hopes to be right. It just seems everyone who is experiencing the vibrations, some worse than others, have the old motors on their Phantom. If a firmware was able to screw it all up, a firmware is able to correct it. If more people bother DJI about it, then they'll get the hint this is a big issue.
By the way, I have the version with OLD motors and NEW body shell. I wanted to wait with this firmware update but DJI GO app was very annoying with "please update firmware" and more I red many positive comments about 1.5 firmware so at the end I updated. Big fail, next time I'll wait at least to months before upgrading!!