On MacOS and iOS, GoodNotes is very effective with the quirks that come with both platforms. However, the Windows platform has a plethora of quirks that can make a Windows GoodNotes as good as the one on iOS. Here is a quick list I came up with that would enhance GoodNotes on the Windows platform:

Integration with Windows apps: Integrating with other Windows apps such as OneNote, Microsoft To-Do, or Microsoft Office would make GoodNotes more useful and provide a better user experience.

Cloud integration: Windows users often rely on Microsoft's cloud services like OneDrive or SharePoint. Integrating GoodNotes with these services would allow users to access their notes from anywhere, making the app more accessible.

Windows Hello: Microsoft's biometric authentication system can be integrated into GoodNotes to enhance security

Cortana integration: Integrating with Cortana, Microsoft's virtual assistant, would allow users to take notes using voice commands, making the app more accessible and convenient.

Touch and pen input optimization: Just like how GoodNotes is optmized for a apple pencil on the iOS platforms, optimizing GoodNotes for surface stylus's would make it more intuitive to use on Windows devices

Microsoft Teams integration: Integrating GoodNotes with Microsoft Teams, Microsoft's collaboration platform, would allow users to share notes and collaborate in real-time with others.

Also, another thing I want to add is the inability to copy and paste GoodNotes ink objects. Or any built in objects really.