There are very few changes in how D3V affixes work on items in Reaper of Souls. Currently, the trifecta stats are virtually unchanged.
The big differences are some added affixes, especially Crushing Blow,
and the huge increases in possible stat values and Defense numbers. Those big stat rolls are behind most of the easy RoS item upgrades,
since shoulders, boots, chest armors, pants, and bracers all look much the same in RoS as in D3… except they have 500 more to the mainstat and/or vitality.