The most obvious difference is that the DAZ tab has moved from the T-shelf on the left of the viewport to the N-shelf on the right side. Not sure why add-ons cannot define tabs in the Tools shelf anymore, but so it is. Here is the same character imported into Blender 2.79 and Blender 2.80:
The same changes have also been implemented on two of my other add-ons:
MHX 2 importer: https://bitbucket.org/Diffeomorphic/mhx2-makehuman-exchange
Those add-ons are not really supported anymore, but at least the basic features now work under Blender 2.80.