I think it would be convenient to be able to add a date to the "Current location" field.
For instance, there may be sources for someone that mentioned where a person has lived. I usually put that information under "current location", as it's the current location according to that source. But a person can have had many residences throughout their lifetime, so the ability to indicate that "in 1860 lived in this town, in 1874 in that other town, and finally in 1892 lived somewhere else". Would be very convenient.