I found this about raw sweet potato:

Sweet potato shows trypsin inhibitor activity. That means it contains an enzyme inhibitor that blocks the action of trypsin, an enzyme that digests proteins. The trypsin inhibitor prevents the digestion of protein. Sweet potatoes with higher protein levels have more of the trypsin inhibitor. This makes raw sweet potato difficult to digest. The trypsin inhibitor is deactivated by cooking.

One way the raw food diet helps people is by supplying food enzymes. Food enzymes do part of the work of digesting the raw food. Enzyme inhibitors increase the amount of work that your body needs to do to digest foods. Enzyme inhibitors force your body to produce more digestive enzymes. This uses up resources that could be used to produce detoxifying enzymes. When animals are regularly fed enzyme inhibitors in research, they become sick. Sweet potato should not be eaten raw.
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I have an awesome receipe for Cilantro pesto.....it's awesome on roasted sweet potatoes. I'll see if I can dig it up. Other than cilantro it has: garlic, olive oil, pumpkin seeds, brazil nuts, sunflower seeds, sea salt, ground pepper, and lemon.....it's so yummy on veggies, chicken and fish too.
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I'll have to try the chips.....6 hours of cooking but sounds good and probably better than the sweet potato ships in stores.

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I don't buy white potatoes anymore...the sweet ones are so much better.