I have noticed that Techdraw is lacking some of the features that were in previous versions of freecad, for instance the ability to change the line width of the image of the part. Also the ability to remove the crosshairs that identify the center point of circles and radii. Both features i think are important for technical drawings of printed parts, etc.
The Exploded Assembly workbench doesn't seem to function anymore. After selecting items to be exploded and the face normal to get the trajectory direction vector, the module doesn't do anything. It created the SimpleGroup in the model tree, but there is nothing associated with it.