Creation of AR "artist-recording" during of release addition can save a lot of time required for make numerous identical AR's.
In most if not all cases an album (or a compilation of one artist) contains up to 30 recordings of the same artist who sings and/or plays on the same instrument. It would be logically and easy to select the vocal and the instrument and create at once 30-60 AR's "artist-recording" by one click (the artist should be suggested by default as performer for all recordings, such as the same artist is now suggested by default as artist credited to all recordings in the tracklist). But now we have to create 30-60 identical AR's "artist-recording" separately!
The same thing is for other musicians who take part in a session (or live concert). In most cases the same musician (or vocalist) performs on the same instrument (or vocal) in all (or several) recordings of the release. It would be logically and easy to search this musician in database, select his instrument/vocal, select the recordings in which he participates (all or several in the release) and create up to 30 identical AR's at once.
Without this improvement our database will stay incomplete (without AR's) for a long time. The actual process of ARs' creation is too unproductive: the time required for create AR's for only one release is comparable to addition of dozens releases without AR's.