I was also on this voyage. A lot of what happened wasn't under Cunard's control. The folks on BA whose luggage was delayed had very little with them in terms of clothing, and they were told that they didn't have to conform with the dress code. They really had no choice, most only had the clothes they had travelled in. A lesson learned - do not travel in your PJs! Also, it was not Cunard's fault that we had to go through immigration twice. Luckily immigration in San Francisco was quick.However, I do think we should have been warned that the Marathon was going on, we were not delayed by it, but I imagine it could have caused some problems for folks disembarking.
I do agree that service in the Golden Lion was slow on some days, but what you experienced was extremely bad, and very unfortunate. Staffing is not up to the usual level as yet, and this does show at times. However, we were fortunate that this did not impact on our enjoyment of the cruise. Jaime Paiko, the Cunard Vice President of Sales was on board from Vancouver to Los Angeles. It would be interesting to hear what she thought of the voyage.