You can assign everyone tasks, fight alongside more then just 2 or 3 of them at a time which helps to make the missions where this does happen all the more exiting. Even the final battle of DA2 which I dislike for story reasons I still look forward to it because you're whole crew is actually involved this time which makes the finally battle a lot more easy and more fun.
One of my, admittadly few, issues with Dragon Age: Inquisition is that there is no mission where you're whole crew fights alongside you. While I love DAI that always bugged me that we get got a mission where your whole crew teamed up to kick the enemies @$$ and while Trespasser is amazing I was still disappointed that it focus more on you, your advisors, The Iron Bull and Solas with everyone else more playing the role of supporting cast. Even Iron Bull isn't given that much attention as it's really more of a case of him adding more dialogue in a few scenes and one choice that comes up at the end.
And given that Heists are rumored to play a role in DA4 I would like it if we got more missions where our companions helped us out. Like maybe while the player character and the selected party go in through the secret passage we send another team to attack the front as a distraction and a third team is sent to secure your getaway boat or what have you. Or during a party infiltration (like Wicked Eyes and Wicked Hearts from DAI) You are the distraction while you have another team steal something from one of your targets.
I really would love that to show up in DA4.
