Chris,
Maybe Marketo can help you do this more efficiently.
You have to share folders in the Default, then clone over the assets into the new WS. This is a cumbersome process and I've found it doesn't always let you share folders when it should.
What exactly would you want to move to the regional WSs? I'd stick with
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Program Templates
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Asset Templates
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Smart Lists
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Forms
You should just rebuild any lifecycle campaigns within each WS, assuming you also have lead partitions and no global lifecycle.