One of the features that I used to use regularly in NAV to assist with maintaining data integrity is the Database Test feature / Test field relationships between tables. This feature seems to be unavailable in Business Central.
With the configuration package and the ability to turn off field validation and table triggers, whilst can come in very handy, in the hands of the client who may not fully appreciate its impacts, it can leave behind a trail of orphaned records. And these are likely to be discovered at the worst possible time, causing painful disruption to the business.
There doesn't seem to be any sort of tool for this so would really appreciate it if Microsoft introduced this feature into Business Central.