Nicholson had to enlarge the rudder of the Nich 35 mid way through the production run.What tosh. Broad sweeping generalisations about boats of that era are rubbish. You claimed it was obvious that the Swan 37 rudder is too small - well if that's the case produce one bit of firsthand knowledge to support such a criticism.
The aft sections of the Contessa 32 had to fattened out after hull no 10 because the cockpit back flooded via the cockpit drains with a full crew aboard.
I was looking at a She 31 in a cradle two weeks ago, it had a very similar profile to the Swan 37. Only a fool would have considered the coupling of a slender aft counter and titchy rudder anything but a broad reach broach waiting to happen. All great fun around the cans in the Solent but 1000 miles offshore!
Re. Contessa owner love. I am sure the members of the Morgan 4+4 owners club give their weekend fun vehicles similar praise but so what. The number of tired tatty CO32s stuck on the market indicate they are over rated and over valued by their owners.