Ok, so this isn't exactly anything new, but I have spent more time than ever before thinking about this on my current playthrough;
Regarding the quests present in Markarth - perhaps the most corrupt and troubled city in Skyrim (subjective) - and namely 'The Forsworn Conspiracy / No One Escapes From Cidhna Mine', I have been further contemplating the choices that must be made.
Centerpiece: Thonar Silver-Blood and Madanach, the King in Rags.
Markarth is a city that - no matter what - ends up in a somewhat ambiguous state, it's simply about deciding what choices make the most sense from a RPing perspective.
Countless times, I have gone through the Forsworn questline on every character without thinking too much about it - and almost every time I have ended with killing Madanach and escaping alone, being greeted by Thonar upon leaving the ruins.
This is the first time that I have considered actually skipping over the entire quest and allowing it to become cancelled following Markarth's entry into the hands of the Stormcloaks. This is where things reach the point of pure RP (I'm not talking about gameplay/visible world effects).
The point where this idea gives me pause is the thought of people like Madanach and Nepos remaining alive, as well as Thonar being able to potentially continue his crooked manipulation of Madanach.
The thought of the Stormcloaks being in charge makes things more agreeable - as is shown by the quest being cancelled (implies that the stormcloak guards would not allow/follow such conspiracy nonsense) - but I still find it unsettling to think of these crooked individuals remaining when I know of their true nature.
So then I come back to the idea of pursuing the quest and killing Madanach - but this brings me to the moral dilemma that many have faced: the fact that you are essentially assisting Thonar - the real man behind it all. I don't have much of an issue with Thongvar, as he is more of a straight-up stormcloak supporter, but Thonar is a spineless puppet-master with an over-bloated ego.
Do note that my current character is a Nord Stormcloak supporter with a heavy cultural connection to the Skaal (tradition and value-wise).
Needless to say, this is one of the most morally grey quest-lines in the game, but I've just been having particular difficulty finding proper justification for any choice on this current playthrough.
Is it worth going ahead with the quest knowing that it will involve my noble character being sent to prison where he will inevitably need to kill to get out?
Is it worth allowing the quest to become non-existent under Stormcloak rule and remain blissfully ignorant of the city's issues - even though deep down I know that all is not well, and Thonar's corruption is most likely as rampant as before?
Anyways, I would very much like to see what anyone thinks about this matter, and how you approach and interpret the well-being of Markarth and its future.