Replace teleporter with a jump pack if you ask me. This adds time to react to the FC going in for FoS.

Terminator Commander lightning claws are 80 dmg not 70

I agree with Raffe in one point. FC is going to go ballistic with the hammer and the fist. The problem aren't the weapons itself tho. It's the teleporter that just lets you now time to react and makes the FC hard to control. Have you ever considered replacing the teleporter with a jump pack and mayb...

I haven't played the singleplayer in ages but theres a lot of stuff in there
Relic didn't use for multiplayer. Maybe something blueish would look good haha.

I just cheked it ingame. The GK does not have a ranged weapon with his claw.
The Maelstrom ability does some dmg tho.

build-in, underslung. Not a huge differecen to me

The Khorne dreadnoughts has a underslung like the other chaos dreadnoughts.
I don't think they GK dread has any ranged weapons with its claw (not sure tho.)
might be an oversight or intended for balance reasons.

Nobs are not under performing at all. Don't get this buff.

On their own Nobs kinda do not enough to justify their cost imo. Supported with WB globals/Painboy/Weirdboy/Mek Nobs do really well.
I think Nobs could use a little buff. The 3 sec Frenzy increase might be a bit too much.

* Scything Talons moved from Tier 1 to Tier 2

Nobody gets that anyway, why move it to Tier 2?