devtrackers.gg
Yes, the appearances you get in the Legion Crate include the Armored Officer. The Shinies, 181 Armor Division, and 87th Sentinel Corps have Armored Officer appearances for free, and there's also the uniformed Navy Officer being a free appearance, after the patch goes live.
Do they have different designs as well to differentiate them from the other 3 classes (181st,87th) , like the 104th and 501st officers ?
Yes.
I have every skin in the game so far for the clones. Will I be given Phase II versions of the skin for free because of it?
If you own an appearance, you'll find a crate that unlocks the new Phase 2 version.