Hello - the way to do this now is to go ‘backwards’ in the tangent direction and hit Tab to lock the direction. I get that it is not as clean - I’ve become used enough to it to make it just work. We used to have (v5?) dragging along the extensions as well as on the polygon but that gets very unwieldy and misleading when the angle is very shallow… so we took that out and imposed the Tab version. It is much better, but I agree that a separate dedicated control handle for each would be nicer.
-Pascal