Decadence revolts are gimmicky as hell at the moment. Once you've snowballed to the point of 100% decadence there is no escape anyway. You've reached critical mass and there is no way to fix it as I think Arumba showed with his series on ''Defective Decadence'' on Youtube.
I personaly believe that only the first 2 direct blood lines of a landed dynasty member should be able to produce decadence. That means if you are landed or an emir, your brother, your nephew, your uncle and your children will cause decadence. But not that cousin twice removed that is unlanded and in a persian minor court far away from your influence...This simple rule means that not your entire dynasty is responsible and it means that the system is manageable.
Simply said, only the direct family members of landed rulers are responsible for decadence. That should and I hope it does include the RULER in the upcomming version. Having a drunk, lustful greedy sultan should not be ''okay'' just because he has a job and a title.:glare: having a decadent ruler should be a pain and a real cause for problems in the long run although not an instantanous death sentence as it is when you've reached critical mass in the current system.
What would be cool though, if your dynasty had been fractured through decadence but you had a pious ruler then you should be able to cleanse your decadent dynasty members of their lives and lands to reduce your decadence in the process!...sort of like cleaning house. Dynastic style...you get it
As for the decadence revolts, I think they should replace the revolt with decadence related faction support such as;
Whenever decadence gets too high...(in this order)
1) Emirs will start backing more often pretenders to take over the reigns and lower crown authority. (50-60% dedacence)
2) Emirs will want to lower crown authority more often. (60-70% decadence)
3) Emirs will desire independence when crown authority is low enough. (70-80% decadence)
4) If you remain decadent then pious non-decadent vassals may get claims on your titles. (80-90% decadence)
5) You are a filthy heathen who has been corrupted by civilization and luxury. Your pious non-decadent vassal with a claim will get tribal support if they rebel against you similar to how vikings get troops for invasions. (if you lose you'll be replaced by one of your vassals instead of some random adventurer with 20k troops and no history whatsoever. I think this is more fun, that governor you installed 100 years ago in libya? Yeah well his family is biting you in the butt now and has a tribal army to boot!)
I also think that muslims should have the following extra CB
1) Invade decadent neighbor and take ALL lands occupied. (instant annex of muslim states to one another making the recreation of the caliphate somewhat possible)
2) Invade dynasty member and take ALL lands occupied. (to reforge fractured empires and force the entire dynasty back in line that is manageable)
3) Organize Resistance. (the casus belli for decadence event #5). A pious vassal (baron or higher) will gather local tribal support (free troops like vikings) and attempt to take over the primary title of the decadent ruler. Thereby replacing it with a dynasty that actualy has a history in the game rather than something randomly generated.