Extrude tool right now works concomitantly so you can select more face to extrude them. Also, auto-facing appears automatically (as semi-transparent faces.
If you did click on an extrude and was a wrong choice, you will click once again and it will be removed from actual list of extrudes.
Bugs are mostly in flickering area and sometimes auto-facing will not catch all faces. Probably when code will be ported to OpenCascade 6.5 a lot of fixes will appear in this area.
Hopefully this new extrude will save clicks, will be more precise (as you can use both the slider and the values using expressions if needed). so enjoy using it! (after last of bug fixing will make it better)