I know that there is a topic about this (and also about seasons cups), opened at season 75 by masterkike, but as no response has been given, I thing we should specify this cup to have a change in the next season.
Older generation cups have an average of 150-160 teams.
The 47-80 generations cups have from 295 teams (U18) to 344 teams (Senior), that is, twice as many as the other cups.
I suggest dividing "Generations 47-80" into 2 parts, one being 47-66 and the other 67-current season.
This would make the competition fairer and encourage new teams.