This an idea, many other MMOs already have something similar to this.
But right now each squad had one tag and tag can mark locations on the map and game world.
But what would be an helpful tool for organizing players is the ability for Commanders to assign a secondary tag to another player in the Squad as a secondary leader or lieutenant or whatever you want to call it.
There is many ways this could be used strategically. Like Commander Tag in front of the zerg and Lieutenant tag in the wing of the zerg to keep certain builds near the front or rear of the zerg.
All of this while keeping the same squad chat instead of splitting the group into two commander squads.
The secondary ( lieutenant) tag will only show on the map to players in the Squad. The commander tag still visible to all players on the map like now.
Commander can give map marking privileges to its lieutenant tags in the group as well and Squad Broadcast privileges.