Just a bit info for those coming here looking for a way to unlock all the skill.
If you set all stats to 30 it will crash, as other have point out.
However, in order to unlock all skill, you didn't need to set to 30
You just need to set to 25.
(with exception for Hinako)
Simply put like this :
For Yuzu & Lime, set all stats to 25. You get all their skill.
No need to set to 30 because there's no skill beyond 25.
For Hinako, you have to CHOOSE, set all stats to 25.
But either choose Attack to 30 OR Support to 30.
Don't set both to 30, it will crash.
I'm currently at the start of the game, no crash so far.
Anyway, thanks for the table.