This information is incorrect regarding CDW coverage when using UR points to book the car rental. The Chase benefits guide states the following in the CDW section:

You are covered when Your name is embossed on an eligible card issued in the United States, and You use Your credit card Account and/or rewards programs associated with Your Account to initiate and complete Your entire car rental transaction. Only You, as the primary renter of the vehicle, and any additional drivers permitted by the Rental Car Agreement are covered

So in summary, when using Ultimate Rewards points to book a car rental through the Chase travel portal I get the same CDW coverage as when using my credit card and charging $ to my card.

I also updated the Chase CDW forum with this info as we are getting a little off topic from the original thread post but I wanted to make this clear because its an important issue.