Really sorry to hear about this happening to folks-- I have an award of a lifetime with my parents in Jan to Australia/NZ that has a (very short, ~2 hr) CA leg in business... thankfully it was booked via US miles so hopefully no issues...
I also agree that UA should open up at least the same class of service on their flights if not outright replace with revenue fares (that CA is responsible for if the leak came from their systems!).
A trip on UA in BF or even GF is not even close to the same as one on NH/TG/BR.