Unfortunately Bumz rush it was not possible at LHR due to the congestion there, the inability to send luggage down earlyfrom checkin for flights and the requirement to have the staff where they needed them. I believe it is all back to normal as of today however.
As for Club going downhill. It is not really. If anything it has gotten better since I joined the company 3 years ago and is about to get even better. New cabins are about to be launched, food is about to be upgraded at the same time and more flexibility in service is about to be introduced (unfortunately by this I dont mean an eat when you want option, thats just too difficult in the cabins as large as they are) and a new IFE product.
Now if you want a plastic, gimmicky and unnetworked service in business then I suppose BA's Club could be a letdown. All depends on what you are looking for I suppose!