I think there may be a couple of problems with this mod.
Lore Books. I'm not 100% sure about this, but I think this mod interferes with being able to open and read lore books. There have been times that I've found lore books that can't be read, and it seems like, when this happens, the commonality is that this mod tagged the book with a rarity descriptor like "Common Gray Lore book" or "Rare Purple Lore Book". When I trash the book and pull a new one from creative inventory without a rarity descriptor, I can read it just fine.
Temporal Gears. These are kind of annoying because they don't stack. The only way to amass these things in any kind of quantity is by aged crates, which can store many of them. But without this, it's really, really a hardship, since unlike that "other block game", inventory space is precious in VS. However, when a rarity is assigned to a temporal gear (e.g. "Uncommon Temporal Gear" or "Rare Temporal Gear") they can no longer stack in aged crates because of the rarity descriptor. The only way around this, unfortunately, is to trash the temporal gear and pull a new one without a rarity descriptor from creative inventory -- this will allow you to put the temporal gear into the aged crate.
I really think that this mod would be greatly enhanced if either these problems were fixed, or else a config file option to exclude certain items from the rarity tagging.