The ability to see the engagement score on the opportunity card is HUGE. However, it seems like a useless feature if a user can't see WHY the opportunity has that score. I'm suggesting that the engagement score (at least in the contact profile) be clickable and open a summary of what that contact did to achieve that score. Not all users are admins and know what the ins and outs of the scoring system are.
Secondarily - the fact that the engagement score can be seen on the opportunity card when it appears to be a contact field seems to indicate that any contact field could be made visible on the Opportunity card. This would be a game changer if possible and I'd love to see it!