Hey dudes and dudesses,
For those who don't like the shard system, I want to ask you - do you do daily missions? If you do them all every day, do you use 1 refill a day during regular events? You get about 200 kobans, you lose about 200 kobans. Since I figured it out, I always get those two event boss girls "for free".
For me shard system seems:
Good for regular events. One koban refill per day works.
So/so for Epic Days. You'll just have to plan for ~3000 kobans per girl and deal with it.
Legendary Days - bad for most of players. While it provides sort of guarantee for players with lots of kobans, regular players will end up with a partially attracted girl for the rest of their stay in this game. For those players old approach of all or nothing seems better (something like switching it back for low chance x100 shard reward)
Anyway, good day to you all!