Add Marriage License Field
At present, Family Search has several fields related to relationships, including marriage and divorce. I would suggest adding a drop-down option for marriage licenses.
Quite often, a marriage license date is the only data available. Commonly, patrons submit the license data as the actual marriage data without any notes, leading to confusion. Additional confusion results when license dates are added in addition to marriage dates. They do so because there is no other option except "Marriage" in the drop-down menu.
In theory, patrons can use the "about [date]" feature; in reality, that does not happen. There's a (very) slight chance, of course, that the couple did not get married. It's been my experience, however, that patrons are just seeking to establish a date after already verifying the relationship. Marriage dates are always helpful, but particularly critical when attempting to determine biological relationships among blended families when one of the mothers has passed away.