I was thinking about the Skaven, and what new enemy units we might get from them. I had these thoughts.
Clan Eshin has only one rep, the infamous Gutter Runner. What else could they contribute?
So I suggest:
Night Runners - a new Elite who, upon seeing the heroes, will attempt to close to melee range with faster melee attacks. They will dodge and roll, being hard to hit at range and in melee. Not obnoxiously so; just enough that they’d actually take some attention, rather than be something you can easily sweep aside.
Clan Pestilens got Plague Monks in there, but I think Censer Bearers would be good, too. They’d attack with big swings of their plague censers, but also be able to swing them in a circle while near the heroes to create a damaging aura, forcing you to back off. They would have a lot of health, being so devoted to their cause, making them hard to just shoot down easily.
This even makes me think that it’d be cool to see an alternate patrol of Pestilens Monks and Censer Bearers sometimes, instead of just Stormvermin. You’d hear them chanting as they march.
For the Chaos side, I’d love to see Nurglings.