Agreed - how about some of these, taking advantage of FF tags?
Quadruped
Melee unit gains +1 move and changes to the Mounted combat type
<TempUnitCombat>UNITCOMBAT_MOUNTED</TempUnitCombat>
<iMovesChange>1</iMovesChange>
Swarm of Flies
-1 health in nearby enemy cities
<CityBonuses>
<bApplyRival>1</bApplyRival>
<iBonusRange>2</iBonusRange>
<fHealth>-1</fHealth>
</CityBonuses>
Disturbing Presence
-1
in nearby enemy cities
<CityBonuses>
<bApplyRival>1</bApplyRival>
<iBonusRange>2</iBonusRange>
<fHappy>-1</fHappy>
</CityBonuses>
Seductive Presence
spreads Influence in nearby enemy cities, supresses nearby Influence production
<CityBonuses>
<bApplyRival>1</bApplyRival>
<iBonusRange>2</iBonusRange>
<fInfectCulture>2</fInfectCulture>
<fCulture>-1</fCulture>
</CityBonuses>
Warp Conduit
Chaos Sorcerer gains +1XP per turn; +50% to miscast
<iChanceMiscast>50</iChanceMiscast>
<fCasterXPRate>1</fCasterXPRate>