Here's something else... I would like to be able to group troops, tanks etc, into formations that I can send to attack as a whole. This way, i don't have to click on every individual to set them each day. I would form a line and they would have the same effect as merging troops (restricted to the "slowest" etc) This wouldn't allow them to gang up on something but attacks would work as currently set. The entire group would come to a halt if they run into something, their formation is broken for loss, etc.
Strategically, I would like to line up tanks in a row, with say 4 gaps between and then fill in with infantry and have them advance at the infantry speed without having to micromanage the group. Basically I want the 1st cav to support the 101st. (still want the 82nd airborne)
I am looking more at WWII than WWI. There will be front lines but wouldn't it spice things up to be able to drop in some beefy infantry behind the lines to reek havoc. (I just realized that by grabbing land behind lines, you would be building your empire without really having any way of receiving these assets. Shipping, trucking etc. and no I don't want to have to deal with that crap anyway.) This would make people defend their bases because I could drop in, grab one, and now you have to fight on another front.
I am not there yet, but I believe that strategy might get bogged down with the micromanaging. Sooner or later we will get to having too many troops to deal with each one and will just leave them there and wait and see instead of placing them where we would really like them to be.