Lee,
Please never (I repeat: NEVER) take the bark off a round log! Round logs with the pith enclosed will rapidly crack. When the bark has been removed, those round logs lose moisture very quickly. This rapid moisture loss causes the wood to shrink, but the pith and its growth ring orientation does not allow for shrinkage. This leads to the wood cracking; often with deep cracks running beyond the sapwood.
In this case, you need to thin down the sapwood anyway, so there is no benefit of removal of the bark while it is till fresh. When did you remove the bark? If the wood is still green and you removed the bark yesterday, chances are the wood is already ruined today, if you stored the wood indoors the last day.
Myself, I never remove the bark off my fresh yew logs/staves anymore. There is no advantage in doing so, only risk for cracking.
A 58" stave is too short for my liking. I prefer longer bows, so I cannot comment of the design. But a 2¾" yew log is not too narrow at all. It will be hard to keep it wide, so a longbow makes more sense. But a bow is perfectly possible with that log diameter. But the short length is another story and may apt for a change in design...