I love the old age system, actually. I am playing MA Agartha, and I have two diseased mages, one of which is feeble-minded. So, I "retired" them with a title (Lord [name], Master Mage) and retired them to a "nursing home" province.
One thing I would like to see is for units to "upgrade" due to old age (eg, hastati -> principes -> triarri being the most common one). Especially for those Polypal Spawns to grow into Aboleths (envisions a couple "missed" decay spells to "force grow" some Mind Lords).
