Still hesitates off throttle...

It seems like you saying that the Vcan is retarding the timing?
Did you set the base timing with the Vcan disconnected?
In Neutral;
when slowly opening the throttle, the vacuum advance should not start until something like 1600 or even 1800 rpm, and, should not be all in until near peak vacuum develops, say around 2200rpm or perhaps more.. They are usually adjustable.
While driving;
But as soon as vacuum begins to drops off, no matter the rpm, the timing should begin to drop out too..
Cruising along in Drive, and slowly applying throttle, the Vcan should drop to zero long before the trans kicks down.