I contacted Parker to express my disappointment with the new ‘51, and to my surprise had a very polite reply. They think they’ve conducted the necessary consumer research and chosen the most suitable nib and body for the job. I politely disagreed. It’s not a pen I would recommend anyone buy. A £5 disposal Pilot is better.
If the 51’s on your radar, go vintage.
Otherwise for the same money buy a Kaweco. The Sinn of pens.