A: 

The parameters that are encryted are controled by the NonEncryptedParameters node in wc-server.xml. Adding the url parameters you want to stay in clear text to that node mean they don't get encrypted.

<NonEncryptedParameters display="false">
    <Parameter name="storeId"/>
    <Parameter name="langId"/>
    <Parameter name="catalogId"/>
    <Parameter name="categoryId"/>
    <Parameter name="productId"/>
</NonEncryptedParameters>

I found the answer on IBM's Forum and a link detaling the use of the NonEncryptedParameters Node which talks about doing this for cache purposes.

David Waters