There are some possibilities for making visibility easier, particularly in small spaces. It will be more problematic for the GM. The player’s have a limited view based on the position of their mini, but such restrictions don’t apply to the GM’s view. It’s a valid concern that deserves attention.
Walls and floors that are used only for visibility and movement have come up and will be implemented. I’d like to get them in sooner, rather than later. Thanks for the reminder.