The Uff Da discusses why the Giro di Coppi doesn't have a 1-2 class this year. First, remember that if you are a 1-2 and 35 or older, you can still do the Masters 35+ race - that field is 35+ 1-2-3-4-5.
As for the rest of the story - the Tour de 'Toona was scheduled in conflict with the Giro. We figured there wouldn't be enough 1-2 racers left to make a decent field at the Giro, and to the extent anybody showed up we would be taking a handful of racers away from a premier race that is very well attended by local 1-2 racers. So we added an extra lower class, to really give the lunchpail racers some options. Cat 4 and 3 men (and 5s) and masters form the backbone of MABRA racing, and their fees subsidize all the other classes, including the nice the prize lists in the men's and women's P-1-2 races. These classes pay for the other classes, but their racers are often shut out of races because the fields fill up really quickly. So we decided to do a good deed.
After we had set up these fields, obtained permits from MABRA and USA Cycling, obtained insurance and set all the other race details, the promoters of 'Toona announced they were cancelling their races. To change fields, we would have had to re-do the whole process, and sticking our volunteer promoters with that duty (along with asking all the other administrative people outside the club to hurry-hurry) wouldn't have been fair. So, younger 1-2 racers, we're sorry that we won't be seeing you this year, but please understand that we weren't trying to 'dis you. It's just how it shook out. We anticipate that we will have a senior 1-2 next year.
For what it's worth, the 5 and 4 races are full, the 4/5 35+ is approaching 50 (in a 75 rider field), the 3s are about one third full. A handful of Masters 35+ racers have registered, and precisely zero women are in as of 6:15 this morning.