We are using the custom object functionality, and I stumbled on the ability to edit the displayed properities on our associated custom object card when viewing it from a different object type. See the attachment for an example.
It would be valuable to have the ability to customize the properties visible on all object cards. Example, I don't care about my Close Date when I see the cards as much as I may care about the RR Inactive Date.
This would also be valuable for Contact assocation cards. We would like the option to display the mobile phone number property instead of the phone number property.
It seems like HubSpot has lade the foundation to enable this.