Dont you just hate it, when you have many units in 1 tile and you want to move some of them somewhere and you always have to right-click on the stack and select the units you want? I do. So I propose:
Theres a button where you can select the number of units you want to move, which type and the injured ones will stay on the tile.

This should make more easy when you are attacking with many units.

they have this in PTW and C3C, there's a 'move stack' button above the info box

You can also shift-click in the right-click menu and select a group of the ones you want to move.

But if I want to move like 10 out of 30 modern armors. Thats what I meant. Or if you got some injured units in the stack, you some times want to leave them back, so there should be a button to sort them out.

A magic button that can read your mind!?

Nah, I don't like this feature because I probably won't use it, and it's difficult to program, considering that you have to enter in what kind of units, and how many, and health stats.

It is not this difficult. Ihave seen it in another game. But I never used it, so it is kinda useless.

C'mon guys, give my ideas a chance ;)

But if I want to move like 10 out of 30 modern armors. Thats what I meant. Or if you got some injured units in the stack, you some times want to leave them back, so there should be a button to sort them out.

I see this as being a tool, which would be easy to program from the stacked movement concept. However, I see it as being of limited usefullness. I ususally, stack my fully repaired units in stacks of 30. Then when I want to move a couple, I can easily unfortify a couple or take all of them with with me.

I SODs were to remain in the game, it might have been usefully to have a remove injured option, but fortunately, SODs are going the way of the dodo bird.

Doesn't this also depend on the quality of your system?