Priority gacha ought to change, honestly. Instead of just 6* girl pool, 5* girl pool and so on, there is also a chance to get the priority girl pool. Something like: 6*/0.45% || 5*/5.4% || 4*/27% || 3*/57.15 || priority girls/10%. And among the priority girl pool, 6*/10% and 5*/90%.

Anyone on disqus can transmit my idea to the staff? May worth the shot.