I like the idea of eventually having some Commander-type units that serve a leadership role in their armies similar to tabletop WH.. We should probably just focus on cranking out the already designed units/techs XML etc for now; but that idea of potentially using some Great People to act as the lower-level generic Champions/Heroes etc prevalent in WH is worth a thought for later (just settling them for various production boni can be rather dull). I think Xienwolf is now focusing his work on extending advanced AI handling of current FF features (another benefit of sticking to standard FF codebase so we can update it easily); so hopefully this might be a workable/fun game feature in future.
Absolutely! This doc ->
http://modiki.civfanatics.com/index.php/Civ4LeaderHeadInfos
is a treasure trove of leaderhead tweaks, enabling plenty of scope for scheming Skaven (iDemandRebukedSneakProb), rabidly intolerant Estalians (iDifferentReligionAttitudeChange), Dwarves with ridiculously long memories (crank up those MemoryDecays and MemoryAttitudePercents etc), raving/warmongering Chaos, and all kinds of other assorted goodness (and badness). Ahriman as you were asking about tech Flavors, leaders can have different preferences toward the Flavors (Economy, Military, Magic etc) coded here; I think that's largely the extent of what flavors do.
Not much changed about leaderheads in FF, but a few new tags from FfH are documented here as well:
http://forums.civfanatics.com/showthread.php?t=238077
Hey cool thanks for the info! Definitely we have our work cut out for right now without trying to add more to it. I just like to post ideas as I get them before I forget. LOL dwarves with ridiculously long memories, should make for an interesting game.