Option for additional in-between states on head turns.
The snapping of the head to different views isn't a big deal if you are using the pose to pose feature. It really stands out however when pose to pose is off. I would like a few in-between states for the head turns.

Do you mean that you want more than 5 stopping points or views or do you mean that you are trying to get more layers into the head turn? As noted, you can add several image layers that play in sequence to a single view by using cycle layers behavior, allowing for a smoother head turn with more ‘in-between’ frames. However, assuming you are asking for more pre-defined views in the rigging, that wouldn’t solve your request.
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Brian E. Young commented
Yes a way to had some extra layers. I tried to figure out a way with cycle layers, but couldn't find a way that worked