I don't see how immunities make anything impossible unless you make a creature immune to all physical attacks.  Then, I suppose, a full fighter army would be unable to proceed (w/o scrolls or what-have-you). 

 

Making something immune to fire/blind/sleep/poison/etc is by no means making it impossible for anyone.

Give us an option to toggle that ugly shadow layer ( explored fog of war ).

Ability to leave the map from any edge instead of pre-defined 'world map buttons'

 

Choose what side to spawn into a map. I'd say about half my playtime was spent zoning into Gilded Vale from the right side and having to run to the inn on the left.