Hi! I have done some tests where I combine several retopo tools into one MASTER tool  I'm not sure if this a good idea so I will invite all users to to test this out and give feedback what's good and what's bad. This only first alpha so be nice..  Master tool ( select quad tool) now is doing this: - CLICK surface = Point/faces tool - CLICK edge = Quad tool - CLICK vertex = Poly line tool - SHIFT + LMB polygons = Knife tool (After first click you don't need to hold SHIFT down