Similar to the idea from Steve Hall for SQL Data Compare, SQL Compare should also get the ability to read backups compress by SQL Server.
There is a feature for compressed backups, but unfortunately "this compression is not supported" if you try to read from a BAK with the standard compression of MSSQL.
That would be very important to make partial restores and to have an efficient way to deal with the day-to-day tasks, because bih DBs cannot be handled without compression.