Just that the Moz algorithm is going to look at better signals OR ranking factors now for calculating DA.
The new Domain Authority is better at understanding sites which don't rank for any keywords at all than it has in the past like using link manipulation..
Here’s the link to announcement from Moz
IMP : Moz is not even able to crawl all the links and Ahref & SEMrush is becoming more popular and go to tool.
Slowly DA / PA will phase out.
People will start using other popular metrics soon ( DR by ahrefs is becoming popular)