- reduced the defences of elites and solos (removed the +2 to 3 defences)
- reduced solo's HPs to about 80% of that in MM1
- increased minion damage, and confirmed minions with roles (e.g. soldier minion).
- introduced new stat block, along with traits and triggered actions
- increased damage to all creatures, most notably in paragon and epic
- generally made monsters a bit more interesting (certainly than MM1)