Since I'm posting some suggestions, I had another one for better mechanics. I know you're saying you have a lot to do, so this is just for you to add to the "maybe" list.
Though this probably makes the game harder, it should be more interesting....
When I play fire mage, a key strategy is blast water then nuke all the ranges enemies while they can't attack me because I've one-sided broken line of sight. (Or save my wands of fire for other ranged characters for opportune moments.) Seems totally unfair that I can "see" them and so target them when they're technically out of line of sight. But also, it makes sense that if they're in range, not taking cover, I should be able to shoot at them.
So, I would say either (1) give an evasion bonus to the target for every square of fog or obscuring clouds that a ranged attack or ability has to cross, so firing deeper into unseen territory makes it harder to land a hit, and do this the same for both players and enemies so the advantage/disadvantage of clouds is symmetrical. Perhaps moving in this context increases the evasion bonus further. Beginning (dumber) monster archers would just hold their position, and advanced (smarter) archers would have to decide how to balance their success of hit and their odds of dodging, or to take advantage of the movement evasion bonus (if applied).
Or (2) stop displaying out of sight enemies on the game screen, and instead present tiles of each aggro-ed enemy between the map and the abilities panel (when mousing over something for description, this would be replaced with the description). But we still want to try to attack those foggy enemies, so add the ability to target "unoccupied" squares (attack ground) within range (perhaps A+click, or added to Z+click). Added bonus, players with a fire staff should be able to target flammable ground with it anyway, and players with a storm staff should be able to target water and conductive/flammable clouds anyway, and any ranged character who found a hidden monster and backed away should be able to target that square.