Re: Post "gotchas" here
HS5eR, p. 25: "Heroic characters are typically subject to the Normal Characteristic Maxima rules, which restrict their ability to buy Characteristics: beyond a certain point, they have to pay double cost to improve their Characteristics. They do not receive Disadvantage
points for this."
HS5eR, p. 32: "...Normal Characteristic Maxima, applies only to Heroic campaigns; usually it acts as a “default” for the campaign and does not count as a Disadvantage."
So, in 5eR, CM was not explicitly mandatory for Heroic campaigns, but the language used implied heavily that CM in Heroic campaigns was an assumed standard. However, 6E1-49 is explicit in declaring CM to be optional for any campaign, Heroic or Superheroic. It is also explicit (where 5eR was not) in indicating that CM is setting-wide, and not a dividing line between non-super and super characters in a Superheroic setting. (By the way, 4e explicitly stated the opposite of the latter...)