ZFS as backup solution

I am brain-storming a simple backup solution.

Backup server syncs all servers files via rsync to an local ZFS pool and uses daily snapshots for backup iteration ( zfs-auto-snapshot).

Additionally remote MySQL servers are dumped locally. Should we compress the dump via gzip or lets take ZFS care of it (default compression)? As it seems gzip-compress dump files dont benefit from the snapshot space savings based on the structure of gzip files?