Honestly, I think we need an easier way to organise troops too. It's a real pain going through each individual unit type and changing it's group manually. Would be nice if we could drag units into unit types. Or have some stock options like "split infantry into two groups", "put horse archers and cavalry in the same group", etc.
Heck, even being able to sort our units on the unit page would be useful. There are so many different unit types now that it can be hard to keep track of what you've got in your party.
A unit counter would be really helpful too. Just something at the top to show you the composition of your army. "120 infantry, 75 archers, 32 cavalry" for example.