Yes, this is a good suggestion.  Many of our users have asked us for this too.

On Wed, 30 Aug 1995 18:31:01 -0500 David Boyes said:
>Since everyone's wish list is coming out, here's my suggestion
>for the day.
>
>I'd like to have a "percentage of total operation
>complete" display added to the clients for both backup and
>restore operations. Right now, there's no really good way to tell
>from the Restore Status window how much of the backup or restore
>is completed. The total number of files and total file size
>is available from the database, and the bytes transferred is
>already kept up to date, so it shouldn't be a hard addition to
>make...8-).