I also stay in Berlin as a leisure traveler. I guess as I have never used the club lounge for more than a drink and canape before going out for dinner then the reduction in food offerings does not matter so much. I do miss the sandwiches at lunchtime though. The afternoon offering is now three types of sandwich and a few cakes .
Over the years there have been some cut backs in various ways but at the same time the room rates are often lower than 2005 when I first started staying there, so I guess it is inevitable.