If you want you could still implement 2 small features in the future.
(Whenever you find time and motivation for it.)
1) Small flavour event: Weakest Player retreats
and hands over its assets to 2nd weakest Player (With Small Popup / text message)
2) Small change related to "New Founding Father System":
When an AI player dies, his FFs are given to Human Player
if he has the FF points to pay (with message for each)
Point 2 should only be triggered if the "New Founding Father System" is activated.
Maybe it can directly be included in the "AI kill logic" close to where e.g. the Missions and Trade Posts are destroyed.