Currently squad leader orders are just a way to farm more WP (defend) and some commands are overlapping (attack or conquer), the other is almost unused (regroup).

First of all, commands should be more intuitive and easy to use and at the same time, i suggest to:
Merge attack/defend and delete capture to a single dinamic command.
Attack/capture if pointed on red stuff.
Defend if pointed on blue stuff (change defend to give a +5/10% instead of +20%)

Then each merc should have it's own commando wheel, this would gretly help non-verbal comunication, there are many possible use for it:

Request Ammo
Request Triage
Request to a vehicle to be picked up
Indicate direction you are going (or want to go if on a vehicle)
Possible integration with a paint target feature

I also suggest to remap keys in a similar way of BF3 where "select" button is a dinamic order/ requesr/ spot button depending on the situation.

Also
The lack of human sound comunication in Dust is really annoying, there are no screams, mercs are not yelling at each other.
I understand why mercs don't yell at each other, but at this point we need an improved not verbal com system.