I dont know if anyone else is experiencing the same issue, but I use kobans to attack the bosses 10 times in a row and during events I used to be able to obtain  both girls by the eve ts end, or at least 1 girl during epic days.  With the new system of impressing the girls until 100%, I rarely get one by events end.  I have attacked 50+ times in a row and only recieved 2 to 6 percent for a basic entry level girl.  This is rediculous and they either need to rebalance it or go back to the sheer lu