A user is required to enter their location in the expert profile, but that data might already be in the system. This is a request to default that field if it\'s available.
The Location may be defaulted if there is a user meta value which has been entered with another plugin like BuddyPress, or with custom code. For this field I suggest a Settings option to specify a user meta field to use for the default. Since there is no standard for this, no default field name can be offered. Ideally, a function name could be entered, which would be called to retrieve the default value, which might be in a CPT or other table.
The code for this might outweigh the convenience of the feature. For a job someone might want to enter their country rather than a city which might be in their site profile. This is simply a bit of convenient integration.
If a setting isn\'t offered for this, please consider a simple filter hook which can be called if the original location value is null.