Designing a consistent UI is pretty challenging.
An intuitive UV is even more demanding.
Sad to hear your commitment is limited to 1 hour.
An example of inconsistency is Rename (F2) in the grid
F2 on People and you get the multiline interface.
Indeed it supports multiple values
F2 on Artist and you get the single line interface
Indeed it supports multiple values
I suggest to be consistent
F2 honors the properties of the field
If it is single value, you get the single value interface
If it is multiple value, you get the multiple value interface
Is this controversial?
Yes, as hell
Many detest the multiline interface. I understand why.
Hence add <shift>F2
This toggles the interface.
Multiple values get the single value interface
Single value get the multiple value interface.
At least the behavior is consistent (not to be mistaken for intuitive)