I'd actually like to know what the problem is. F lounges have never been that busy to me. I know other people have reported otherwise but personally I haven't seen it.
Or is the problem that Diamond members just don't feel special enough after all their spending?
Pier this may be true, but Wing is not true (at times). I just tried Wing again on 9/4, arrived at airport at 8 a.m. The lounge is PACKED. Can't get a seat. Dining Room is full and I had to wait for a table. Service is slow because of it (drinks took a good 10 minutes to get to me with many apologies because many people are ordering drinks and servers are running around like headless chickens). Cabana full. Even the shower I got was the last one available.
So there is definitely, at times, a major problem at the Wing. Pier I never had such a problem.