The sheer pain of being a new player and wanting every single waifu rerun while also needing to balance all the upcoming new units.

>Want (high priority)
Miyabi, Yanagi, Alice, Ellen, Ye Shuguang

>Want (mid priority)
Ellen, Caesar

>Want (low priority)
Yuzuha, Chinatsu, Trigger

>Have managed to get
Yi Xuan, Fufu, Evelyn, Astra, Vivian
(The first two I lucked out on from trying the game when 2.0 came out, but I really started playing last patch). I hope they eventually pull a star rail and add some of the 1.0 units to the 50/50 loss pool.