1) I would definitely recommend Easy Item Stack 'n Split v2.7.4 by @Dangerb0y (even though it's old, it's pretty good)
The features your map is missing:
-Allows units to seamlessly pick up items regardless of a full inventory. (IMO SUPER important and I'm still wondering why blizzard doesn't natively implement this)
-Allows splitting item stacks within a unit's inventory.
2) Scavenger Class/Job
-A Unit that can only search stuff, preferably has fast movement speed (and maybe limited to only 1?)
-I actually found it a bit hard to walk around and search only during day because I was focusing on upgrading/reconstructing the base
-Having a unit moving around and searching(when he has stamina) will improve survival chances a lot
3) Typo when unable to search

Since stamina potions mention stamina and not mana I guessed this was a typo
4) Building Health Bar Hiding

Alright so this might just be me but maybe you can hide health bars for search-able units (unless you have them shown to know what to search?)
You can easily hide health bars by changing
Art - Selection Scale to anything negative e.g -10 (Shift + Enter for negative values)
5) Camera Distance
Again this might just be me (xD) but most of the time I set Camera Distance to 3000-4000 because I like to have a better view of the environment.
Higher Values can also be used but you need to change Map Options to remove the black fog:

this example is what I use in my RPG Map and Camera Distance can go all the way up to 8000.