Might I suggest that an option or decision to have a maester treat your illness when you are sick be added? It might help balance out the significant amounts of deaths of historical figures, players and their dynasties, etc from the diseases that were recently added. It makes very little sense that Aegon the Conqueror should die of the Bloody Flux in his prime without seeking any kind of treatment for it from the Grand Maester.



Another option/suggestion would be to add a decision for the major cities to become police states when the plague/illness/etc arrives and lock it down, as Quenton Hightower did before being murdered by a mob. Unsure how this would be implemented, I only know of the police state Household Guard command.



This is only if balance changes aren't being implemented already for the diseases, in the next patch.