The specific issue concerns the unavailability of a property which holds value that can be seen on HubSpot when setting up a Slack notification. Specifically, it is impossible to include "Your NPS Score" value, that can be seen in the Analyze tab for a NPS survey, into a automated workflow on HubSpot for sending a Slack notification.
Generally speaking, there are probably many more cases where values that are visible in HubSpot but are unavailable as a property to work with either through HubSpot itself or its API hinders the potential for otherwise very helpful integrations.
