Story broken because of Crystal Tower quests not showing in MSQ

[Iscah]

While the notification text later could be improved, the game already pointed out the starting point of the Crystal Tower questline to you some time earlier when you were in Mor Dhona, along with (from memory) text highlighting that you would need to complete these quests to progress the MSQ.

As a general rule, do any sidequests marked with a blue "plus" icon.

[Qujah]

As a general rule, do any sidequests marked with a blue "plus" icon.

This might be nice, but as I said:

And there's the thing about "Yeah, just accept every purple + quests". In Mor Dhona, almost every of these quests will unlock hard/extreme stuff and fill your quest log with stuff you don't want. If you're not into that, you avoid it. You just can't tell what it is about, until you accept it. It feels really bad to abandon a quest; you even feel like the game will punish you or your FC somehow for that. So you'd rather not accept a purple quest, unless you know that you need to do that for progress in the main story or job/role quests.