Remove the fog option if the map is Beta is not worth the change required (not so big honestly), imo.
If a player complain about an issue, it's up to the player to give the elements we need to know to fix the issue. How much time and effort is required to take a couple of screenshoot?
Then if the player doesn't give a screenshoot, he must live with the bug...we have Beta exactly for that reason. Moreover we warn players about any possible issue in the maps page, if a beta map is played.
Finally, at some point the fog will go (at the end), so it's not that we can't see it forever. Or players help us to help them, or they must live with a bug. The process is based on cooperation, not "slavery".
The fact we have a Beta stage is already a big hand given to players, but it's not up to us to spot bugs (if there're), we need only ensure to fix them before to consider the map as finished.
This without consider that if the mapmaker wants, he can play the map as well.
Nobodies