I agree with (main) above issues.
Features of Legacy TopoManager should be the must-have level for OneView Maps.
Displaying VLAN information in Maps could be a great feature - but currently nearly useless because they only check if VLAN exists on a device. Although GUI highlight the link between 2 devices with same VLAN so every one though this information will be checked, but it is not. That's very misleading.
The only way to bring this customer effort to extreme is to open GTAC ticket.