I vote a tentative yes for this.
I like the idea in general, I think the scope of changes to Authority policy are not nearly enough though.
As
@dpshw and
@andersw noted, the inclusion of faith purchased units would make it more balanced for the human Authority player.
As
@andersw stated, war weariness and production malus really needs to be looked at, as I feel this is predominately where Authority driven civs are being crippled in mid to end game.
Perhaps the war weariness can be reduced by 50% instead of 25% for the Honour policy, this would aid in long term battles, especially in siege scenarios.
Maybe a war fervor buff for x amount of turns when initiating war instead of the doubling of tribute yields finisher bonus? The war fervor buff would boost the likelihood of gaining ground/capturing quickly if the Authority civ units are close to a city when the declaration of war is issued. This would also aid in mid to late game progression for Authority civs.
Maybe the production malus can be negated entirely for the finisher policy bonus? Typically production is boosted in times of war.
With the tribute policy, instead of bullying CS states only it could be a bonus inclusive of tributes from other civs? The culture gain slows quite a bit for Authority once barbarian encampents and units dry up.