Suggestion: Local Knowledge bonus for city biomes

It would be nice if local knowledge had an effect for city biomes. I propose the following:

Vaal city: items have +10% chance to drop corrupted.
Faridun city: 40% increased quality currency drops.
(Ogham city? I haven't actually found one of these yet): 40% increased jewelry drops (rings, amulets and belts)

And so on and so forth when cities and citadels for acts 4 through 6 come along.

Just a thought, since (I presume) city biomes don't benefit from the talent at all (and considering the mountain biome bonus is either meh or an arguable penalty depending on how it works, be nice if cities did something neat).