I know threads exist for this already but this one will be a bit broader than just expansions.
There is a really big imbalance between what MS can be used for, and what pebbles can be used for. Things need to change quite drastically otherwise this game will essentially be premium currency only to progress or do anything remotely fun.
It would make a lot more sense if any game-related upgrade costs pebbles. These would be:
- Profession Expansions
- Den Space
- Den Tabs
- Nest Slots
Apart from that, there should be more cosmetic options for pebbles too, which might take time, but should also be considered.
Currently, the following things cost Moonstones:
- Mining / Cooking Expansions
- All specialty items (except Eye Besprinkler)
- Both non-starter breeds
- 2 / 3 non-starter markings
- Den Tabs
- Pretty much all custom apparel (which won't change until pebbles are given a reason to be desirable)
- Pack Change (purely cosmetic at the moment)
- Extra Apparel Slots
- Extra Nests
The following things cost pebbles:
- Den space, which is capped at 50 per den tab so you will need tabs eventually.
- Starter breed changes
- Starter marking changes + maned set
- Extremely limited pool of site-made apparel
- Eye Besprinkler
- Most MM stuff- though plenty are not really useful or desirable.
(Sorry if I missed anything in either category)