Okay, so I'm playing through new threat, which has been great so far, but I've come upon some issues I'd like to report. Some of these are probably known, but I want to make sure.
First, the Full Cure materia is supposed to be in cosmo canyon shop according to the documentation, but it seems to be missing, even after reaching disc 3.
Second, All of the level 4 limit quests seem to be bugged.
For Cloud's, nothing happens in shinra mansion's basement, but there are a bunch of documents I can read.
For Aerith's, the staircase down to the alter in the forgotten city doesn't appear.
For Red XIII, I got the key to the cave of the Gi, but I still can't open the door to the cave.
For Cait Sith, I went to the ruins of the ancient temple, where a cait sith was at the bottom of the hole, but there was no way to get down to it.
For Tifa, the piano doesn't seem to do anything, even after playing the tune.
I haven't checked the other level 4 limits.