Baktria v. 1.1 Spoilers...

[Heilong]

1. Do different ethnicities impact where generals should be governing. I haven't noticed much impact from having the ethnic steppe/hellene general govern in the steppes. Also, would an Indus General do better governing in the Sind?

I haven't played Bactria yet, but I know that the different ethnicities will impact a general/governor's traits and ancillaries.

[Ludens]

Likewise, I haven't played Bactria either, but I know that for the KH it makes a lot of difference what kind of town a character governs. Athenians and Ionians will become very unhappy and cause a lot of discontent in type I governments (which is the Agoge for the KH), while Spartans and Kretans don't do well in type II's. It's probably less extreme for other factions, but do pay attention to the ethnicity descriptions. I am not sure if a character can recognize where he is, though. If an Indian does better at type III governments, it will do so regardless of whether the type II is in India or on the Ionian see.

Fleets are cripplingly expensive, so unless you often need marine transport or are regularly fighting pirates/enemy navies, it's best to keep a minimal fleet. Remember also that a unit's upkeep is generally a quarter of their recruitment price, so if you have no use for them in the coming year it might be better to disband them.