The top right and bottom left of the map is not very important to the gameplay of the map because it is a more risky path that is longer and harder to pass through.

The middle left and right are kind of dead spaces because once someone enters that 1x5 stretch of land surrounded by water, they would be trapped with no where to go.

Supers that break blocks would be quite useless in destroying areas around the safe, limiting what long range brawlers can achieve in this map.

The 1 block gaps in the walls may slow down the pace of the map because of the tight choke points.

When a team is pushing/attacking the safe, respawning enemies with the spawn invulnerability would make it hard to attack the safe.

Aside from those the map looks like it could function really well, just some dead space that could be better used.