In case passing would be trained as a secondary skill by 1v1/HA training, that would dramatically change the builds we see today. It would simply be close to impossible to have 22-23 HA/DV with 9-10 PA.
I'm not saying this is the way to go, actually I prefer it as it is now. Just pointing out that this dependency is worth considering.
BBB: 2 (S37 S38); Top tier: 7 (S35 S36 S37 S38 S39 S41 S63); Cup: 9 (S25 S35 S36 S37 S38 S39 S40 S41 S61)