Kislev is my favourite army and is represented very well in the game in my opinion, still I reckon there are a couple holes in the roster and a few units which could be added which would add a lot of personality to the faction. I posted about this before in the unit suggestions but had no repsonse and this is a more expanded and in detail collection of ideas.
Infantry
Standard-
Spearmen
Halberdiers
Axemen - A unit of axemen made up from men not from the kossar ungol tribe. Kislev is a land of steppes and forests so these guys would be woodsmen and other such. This gives Kislev a non-elite unit that isn't slow and unwieldy like the spearmen and halberds.
Ranged-
Kossars
Kvassnics
Streltsi - Would make them slightly more potent in hand to hand combat, they are carrying Berdiche axes but in my experience tend to get mashed by anything that gets in close. Should also only be recruitable in Erengraad.
Ungol Archers - Dismounted Ungol horse archers for a bit more variety.
Elite-
Kreml guard
Droyashki - Would make these a smaller unit but even more potent, the lore talks about these guys being ridiculously elite and among the best swordsmen in the old world.
Druzhina - Young nobles etc, decent armour, axe and shield. Fit the lore (Mordheim captains were Druzhina) Give Kislev a unit that whilst not as effective as Kreml Guard can cover the ground much better than Spearmen and Halberdiers.
Uragon mortar
Cavalry
Standard-
Winged lancers
Kossar Partisans - These guys are basically mounted kossars armed with curved cavalry sabres, heavier than the ungol horse archers and giving Kislev a cavalry unit that doesn't use lances and isn't primarily ranged. Also fit nicely with the lore and fit in well with the armies character.
Ranged-
Ungol horse archers
Mounted militia - Would consider ditching these, Kislev doesn't really need two units of mounted gunners. However, if they are staying would also rename them Kislev Dragoons, the idea of a country where gunpowder weapons are rare giving them to militia doesn't seem right.
Chekists
Elite-
Gryphon legion
Sons of Urson
These aren't wildly extravagant ideas but just a few small adjustments that I think would improve variety and the experience of playing the faction. Thoughts?