Suggestions:

Avian:

remove attack time bonus (Great in theory but would take really that 0.01% niche to utilize that bonus to the fullest)
reintroduce Fog: Set it as +1 extra hour, and viewable with SoTs, Msg like, "A dense fog covers the area"
Give Fog to Avian, Dwarves, Elves
Avian is immune to Fog.

Dwarves:

Reduce elite NW. At least match Human Elites.
Give Fog

Elves:
Reduce elite NW.
Give Fog
Reintroduce defensive military losses bonus
Swap Invis with Mage's Fury. (I realize you may want to make Elves and Halfers more t/ms but they just can't match up with a faery t/m with the current tweaks.) Let them go hybirds instead.

Faeries:
Strong - I think it is fine

Halflings: Swap Mage's Fury with Invis

Orcs: Reduce science penalty to -15% and drop elite NW down.

UD: Okay as is.