After some consideration, what we're going to do is this:
- Remove the decadence value altogether. Muslim empires will use Imperial Decadence.
- The 'decadent' trait will still exist for individual Muslims. The number of decadent dynasty members in your realm (meaning they are your vassal or lower) will potentially give you a 'decadent dynasty' trait which has three levels, and affects your piety and Muslim opinion of you (and very little else). Decadent relatives in your realm can be 'straightened up' as before, and if they ultimately refuse you can exile them (instead of imprisoning/executing them). Exiled decadent characters are more prone to becoming adventurers.
- Decadent characters will tend to ask for titles, estates, and coin -- and get upset if they don't receive it. They like to plot.
- The decadent trait itself will have more effects on the individual character, making for a bad ruler if they ever get into power.
- Muslims who are not in the same realm as their dynasty head (meaning their dynasty head is not their immediate liege or higher) will tend to form a new cadet dynasty.
- Most events which previously raised or lowered decadence will now affect Piety instead.
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