I don't use broadcast to move. What I do instead is have 3 keymaps. Movement-Range, Movement-Tank, Movement-All.

Movement-Range is up / down / left / right (alt)
Movement-Tank is up / down / left / right (shift)
Movement-All is up / down / left / right (ctrl)

As the names imply if I hit ctrl+left the entire team jumps to the left. If I hit alt+up the ranged characters jump forward, etc.

To do this you need:

3 Keymaps for the 3 mentioned.
2 Action Target Groups - tank and ranged.

Then in each keymap you have mapped keys for up / down / left / right. With the appropriate actions of up / down / left / right followed by jump ( spacebar ). These actions should target the specific ATGs you want. For the one that does all you can just use option for that.

From that point you can bind to your normal movement keys. I am left handed so I use the up/down/left/right keypad next to the number pad. Then just practice with encounters knowing who needs to be moved and when.

Oh and there is no need for a movement map for the melee. They'll follow right along with the tank.