Today I tried QGIS 2.13 (dev-version of the upcoming 2.14) and had a look at the now implemented support for “3D-Features” (2.5d support). It works well and makes the workflow described some months ago easier.
Yesterday I tried to reproduce one of my typical ESRI-workflows with QGIS 2.8.x – having some 2D point-features and converting these features to 3D features deriving elevation from a DEM – and at least I need the z-value in the table… a simple task, or not ?