Enhanced gun play, NPC & trader economy, and weapon diversification. Fully upgradeable weapon profiles, numerous variants of each gun. No longer will you go through the zone seeing everyone with the same AK.
Here's another pic of the New Ordnance guns in MISERY 2.0. They're more spread out here so you should be able to see more of the variants.
On a side note I got some news, all the guns in New Ordnance will have brand new animations! (However not in time for the MISERY 2.0 release) That's all I'll say for now ;)