Yes, but that is one of those loose treads I intend to come back to later. They might not look as animalistic as Lizzie because of the engine's limitations
Most of them have in newer updates, from 2024 going forward but I haven't gone back to add them to old ones. I might once the schedule is less chaotic.
There are some big ones, but if you are talking about one of the bad ends where a girls gets boobs bigger than her whole body then no, it's not that big.
Is Grace's stage somehow less than 4? That shouldn't be possible if you are already on her second event but there might be a bug. In theory that is the only explanation, not other variables should affect the "talk to Elize" button. Unless it is time, she is not there at night.
Someone, definitely not me, created a file that modifies the relationships. I can't post it here but it's on the F95zone game page. Not that I condone that...