I’ve played the trial of it and (judging by that), if it did get licensed Subarashiki Hibi would be a very very difficult game to sell to the average JAST customer. Although it’s impossible to tell how things will play out, the story seems to be very unusual and abtruse, as well as in several places completely (for want of a better word) insane. One other difficulty is that Subarashiki Hibi is possibly a sequel to or remake of KeroQ’s first eroge Tsui no Sora, released in 1999 - at the very least, the games share some characters and are probably connected thematically as well (can’t comment on this, as I’m waiting for my copy of Tsui no Sora to arrive).
Sono Hanabira 8 (coming out tomorrow) is probably JAST’s best possibility for a yuri title. Although I didn’t particularly like Sono Hanabira 7 mostly because of the characters, it did have the best production values in the series, and 8 looks even better, particularly in the art department. One of the characters in 8 is a tsundere yamatonadeshiko, which should be a big improvement on the awkward student/teacher relationship.