If a rogue does 70 damage regularly... if 140-210 is max hp, then an average party of 5 will averagely kill anything.
If you want your campaign ender dragon or whatever to last 3 rounds, you'd be looking at about... 630 hp - 3/5 of PCs effective per round for 3 rounds.
In DDN he's not a "striker", he's built so that he does more damage in certain circumstances and less damage in others.
Whether roles are incorporated remains to be seen, but the impression given is that everyone is supposed to do the same damage over time, but fighters do it relatively evenly, and wizards do it to multiple targets, and rogues spike when circumstances allow.
And I still think calculations like DPR somehow violate the spirit of D&D.
If a rogue does 70 damage regularly... if 140-210 is max hp, then an average party of 5 will averagely kill anything.
If you want your campaign ender dragon or whatever to last 3 rounds, you'd be looking at about... 630 hp - 3/5 of PCs effective per round for 3 rounds.
Given that the rogue is usually one of the better "exploration / interaction" characters, then it seems unlikely they'll also be ahead of the curve in terms of damage. Equal? Sure.
Ditto Wizard, with access to utility spells.
And Fighter, who if anything would have to be better in combat, to make up for a lack in the other two areas. So now the rogue is maybe below average? Hmm...

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.