Some things I think Apple’s new Journal app needs:

• macOS and iPadOS support - the iPhone is fine for short, quick entries, but I want to be able to use a keyboard for those longer entries.
• Weather information - I like capturing the weather with my entires, temperature, conditions, they just add a bit to the memory.
• Export capabilities - Some way of getting the entries out of the app. Even something as basic as save to PDF would be enough for me.