Revision 220716:

Ghouls: Disease 2, Cost 150, Upkeep 2
Scouts: View 5
Giant Bats: View 5
Elven Infantry: View 4
Giant Bees: Movement 20, Upkeep 5
Goblins: View 5
Elven Archers: View 4
Dwarf Runners: View 4
Dryads: View 4
Mummies: Movement 15
Harpies: Curse 5
Elven Cavalry: C.Bonus Field +1
Plague Carriers: Disease 6
Pegasi: Morale +2
Light Cavalry: View 5
Wights: Curse 4
Elven Lords: Strength 7, C.Bonus Field +2, View 4
Griffons: Chaos 1
Eagles: View 5
Iceguard: View 4
Trolls: Move 18
Moonguard: View 4
Elephants: Trample 1
Fire Demons: C.Bonus City +1
Spectres: Curse 8, Movement 30, Cost 900
Unicorns: Strength 6, Turns 3, Upkeep 5
Slayer Knights: Move 18
Undead Dragon: Curse 6
Silver Dragons: Strength 8, Medal 20, Cost 1100

Straw Golem: Hp 1, C.Bonus City +1, Cost 120, Upkeep 1
Rovers: View 5
Vampire Bat: Move 24, View 4, Cost 110, Upkeep 3, Setup 70
Banshee: Strength 3, Move 20, Medal 40
Outriders: View 5
Basilisk: Paralysis 8, Strength 6, Hp 3, C.Bonus City +1, View 1, Medal 25, Cost 650, Turns 3, Setup 400
Hydra: Poison 8, Medal 15
Wyvern: Strength 6, C.Bonus +1 Woods, Move 24, View 2, Medal 30, Cost 800, Turns 3, Upkeep 8, Setup 600

To unpack that a little:

-Changes to View based on 5 as the default for scouting units, 4 for other high perception ones.
-A pretty comprehensive overhaul of PPDC units, with a couple of exceptions. Ghouls and Plague Carriers get toned down a bit, Curse units get matched to Banshees, Bashee and Giant Bee movement reduced.
-Since my changes to the Cockatrice already made it a buffed version of the SH Basilisk, I turned the Basilisk into a tough T3 unit.
-The Hydra is hero stack viable, but slow.
-The Wyvern gets turned into a T3 unit, but keeps equal poison/turn to the buffed Hydra.
-I reverted the Unicorn changes for now.
-If we have a T3 Morale 3 unit, a T2 Morale 2 unit is back on the table. However, it's the Pegasus now, which is more expensive than the old EC.
-Eagles stay the T3 flying Morale 2 unit, but Griffons get a role suited for raiding the backfield with Chaos 1.
-Elven Lords and Cavalry get a Field bonus from their role as cavalry, rather than the less useful elven Woods bonus. Lords are more combat focused than Unicorns now, but I'm unconvinced this really gives them a niche.
-Spectres join the faster-than-dragons niche.
-Movement buffs for Trolls and Slayer Knights.

I've left the Lamia and Beholder untouched for now. I don't think Curse is a good fit for the Beholder, and I think we've got Curse covered pretty well already. Assassin might be an option for all their instant death attacks.
According to Trolloc, the Lamia is a little too good on the efficiency curve, but I'd like to hear your opinions on her.

I'm fairly happy with Giants and Minotaurs relative to each other, but the Dwarf Mutants need something more to compensate for their slow movement. I'm considering either City+1 or Chaos 3.

Lamia, Chimera, Barlog belong to the group of very useful units. I don't think any of them are clearly stronger or weaker. Lamia and Chimera are weakened by 2 reduced mobility. Which often makes them the slowest unit in my army. That's why I choose Barlog more often. IMHO nothing in this group below 20 moves will be playable.
Overall the changes look good.