It would be ideal if our waypoints where shared between out boat pc and charplotters, and as well managed on the cloud without us having to download through dropbo to share with a home pc. Cherry on top, puy all the strip charts on the cloud as well.

Maybe works this way?

Home PC
- Sync to cloud account under our user name
- No backups needed, rather user can simply role back to any date choosen.

Boat PC
- Ability to subscribe to a specific cloud account. Changes are exported/imported automatically. Ideally also export all strip charts. Ideally a temporary route level sync is available, so a boat PC can subscribe to primary and guest cloud accounts of multiple users, and bring in a single route of a guest cloud account for a specific race event without bringing everything down from the guest cloud account. 
- No backups needed, rather user can simply role back to any date choosen.
- Ability to choose that waypoints in boat pc are sync to charplotter or processor. Make a change to either expedition or chartplotter/processor, and sync happens within minutes.