Old habits die hard. 

AOM calls it 'Divine Damage', but it's the same thing. I'm not sure it's worth adding another kink to balancing, at least for the base game. It might be nice to add the functionality to the engine for mods. I wouldn't use it in DE though. 

I think the key is to remember that for most (99%) of the game the player will see the tree from a 45 degree angle. So, to give a nice self-shadowing overlapping look, angle the foliage planes flatter (more horizontal or at least at a 45 degree angle) than you normally would. I admit not all trees currently in-game follow this rule precisely, but a the current trees have had a dozen artists over the course of 20 years.

similar to how O is for wounded units,can you get a hotkey for units who are NOT wounded?

hi,  @DesertRose. It is highly recommended to use one branch for each change/feature you want to make. On windows I mostly use Git Bash (it's console) but for some stuff I use GitExtensions https://gitextensions.github.io/ I hope this can help you, last comment.: