Here is something that would probably be too much content with too many branching routes but I'd really like to see it: an event where you can accompany Kasyrra on doing some corrupting. We usually only get to see the aftermath and then get to choose between keeping things as is or trying to restore things as good as possible, but being present on one occasion would open up different options like stopping her plans before anything happens, failing on purpose to stop her for some sympathy points while pretending to be a good guy, or actively helping her pull it off while your party isn't around.
The setup would be that you trigger a trap (if your skills are high enough, you can notice it but still trigger it on purpose if you feel so inclined) and wind up in a prison cell with your party, you can then either try to break out, which would put you back on the same path as if you didn't trigger the trap albeit with some disadvantages or simply wait for Kasyrra to call for you, which will have differing outcomes depending on your relationship with her and how you choose to proceed. After being called by Kasyrra you might want to tell the jailors about your party's escape plans to make sure they don't disturb you while you have the orgy of a lifetime.