The system needs data. well that is a problem and solutions are unlikely.

All of the dead boat society are at least 10 years past their last one design race. Data for these boats is garbage in and garbage out. (violates at least one of the assumptions of the Portsmouth system.) These ratings ... right or wrong should be set in stone.

Hobie 16, 17 and 18 are active one designs and the ratings for these boats simply should not change because you have 30 years of data where they have been the most popular class in NA. The boats have not changed... nor should the rating.

F18's and F16s are limited development classes which get faster over time. This is a problem for portsmouth because the boats coding does not reflect which generation of F18 is setting the rating for a race. Bottom line... The current f18's have a soft PN rating

Moreover, F16s don't have a lot of one design racing So when boats do race handicap the quality of the data is less reliable. (violates one of the assumptions of the Portsmouth system. Bottom line.... the PHRF origin for the F16 rating is probably OK because

Finally, the F18 and F16s need to race against a yardstick boat... eg the Hobie 16 around buoys in a 45 minute or so race.
Not many of those races exist in the USA these days. They race one design and their is no yardstick boats to compare them to.

Portsmouth rating for the A Class is just ridiculous because the
A class are unrestricted development and rating A class means taking the current fastest one. Since the fastest ones now are foiling down wind... Your A class rating is just gonna suck.

Nacra Carbon 20s, Marstrom 20s, Flying Tigers are essentially one off boats.. Fleets do not exist... the Rating calculated is for the skipper... not the boat in this circumsance.

The Nacra 17 is racing one design and the best solution will be to PHRF the rating.

Bottom line....The data have to exist ... IE... that is qualified data before you can run the portsmouth system.

Perversely, the fact that the PN table has not changed in years is a feature... right or wrong... the numbers are set in stone so people just deal with it.

The Portsmouth Committee needs to ID the few surviving Handicap regattas that meet the standard assumptions and get their result times to even have a shot at updating the table.

Sending in race data is not the solution right now to portsmouth updates.