It's slowly been established over time (By looking at village stockpiles of curios), that like in world 7, certain curios are absolutely garbage in comparison to other curios.
Now, it might be because we don't know proper time settings, but even now there are certain curios that take a lot of resources to make, or a lot of luck, and simply do not live up to the task.
To name a few of these godawful curios, we take a peak at our supplies. Certain curios should certainly be bad (Bones from animals), but I believe that every curio should have a value at certain part of the game. It does not make sense for a certain curio that is harder to obtain, or comes in at later stages of the game to be better than earlier curios.
For example, Strange Crystals and Wondrous Woodshavings are arguably very bad, they both rely on RnG, Strange crystals have a massive study time in which they also have a hefty weight (12), for only 2k LP. Wondrous woodshavings have significantly better LP gain, but are still overshadowed due to the weight and study time.
I think that RNG based curios should globally have a rule of being short time big boosts in LP gain, since they cannot be reliably grinded or made, meaning they should have more freedom to be good. Wondrous woodshavings could arguably stay with their weight/lp gain if they had a much more reduced study frame, perhaps reducing the LP at 10 to 4k and having it be done studying after 8 hours, but keeping the 12 weight. It's a short term boost in LP, but still has a bit of a drawback in weight.
Certain craftable curios are just outright bad, such as feather trinkets, and do not seem to have a place anywhere at all in the game; If it doesn't, it should really either just be removed or rebalanced to be a very early craftable curio that gives decent lp/hour over it's time.
Not to mention we also have certain curios that are just wayyy too good, namely Mirkwood Offering, which gives an incredibly 700~/30 minutes LP gain. Arguably, this is due to the experience cost being high, but it's still a very high gain ratio and does not seem to dent my exp gain (But that's also because I'm blessed by RNGesus, given that I've found 2 bluebells and an edelweiss within the first week of the game)
I'm not exactly good at balancing out proper numbers, so anything thrown around here is a suggestion. However, I can very plainly see that we're starting to have the same issue as before with certain curios being absolutely horrible. Knots.
Thus, I call to ask and see if anyone else agrees and what can be done about these numbers before changing these numbers is too late; and the game has adapted to these curios.