I listed them in order of prioritization and importance.
1. Hints / Tutorials / Tips. (Not to many, as finding things out on your own is half the fun.)
-How to find Ylands. So someone doesn't sail in open ocean for hours wondering if they are unlucky or just sailing into nothingness.
-Key crafting Items tab needs to be pointed out.
2.Crafting Menu. Adding a tab for most recently gained recipes would be extremely helpful.
3.More Clay deposits.
4. Ships. Add a Cargo...