OK OK stop saying numbers!
I will get myself into this again.
Just as discussion, not saying I will do these things (or even CAN do them), but what do the rapidly growing mob think of these:
1. Change city expansion; culture does not spread borders. City area is always fat cross and only adds culture to these tiles. So most cities only stamp their culture on the 5x5 area, if they get their outer ring active they affect the 7x7.
Reason this is on my mind : I never liked the "culture spread" thing in vanilla Civ, and it doesn't seem to add much to a game of FFH (especially as culture can switch a city to a different species, over a span of about 300 turns, very slowly doing something mostly useless). With villages/forts spreading a small culture stamp, might be nice to stop cities colouring in the whole map, force use of forts to claim distant resources. Especially fun in no-settlers type games.
2. Assassins; I mentioned an idea before for giving assassins an "opportunity" score, a sort of reverse fear percentage - if they fail their opportunity they cannot attack. Promos will improve opportunity. Also I thought, Bodyguard promos could give a "defensive strike" against assassins instead of / in addition to intercepting; if striking into a city the Crime level could give a bonus to opportunity; special buildings might reduce opportunity as might special promotions; Paranoid, Trap-Setter, etc.
Reason : I was frustrated by being attacked by huge stacks of assassins. This way seemed more fun!
3. Animals to be allowed to enter borders, but not attack cities. I like the idea of tigers wandering in and deciding to settle on your pasture, of hill giants stomping around looking for pigs to chomp on, etc.
OK, now I need to remind myself where I was at... I think I was making an option for Acheron to appear in a dungeon instead of a city and hsi treasure being a pickupable item when the epic lair was cleared... Oh yeah, I was halfway through "barrier" events which seal lairs, and some other stuff...