It depends on game situation. You can not ask everyone to score run a ball. Game Circumstances is the answer. End of.
If that was that true, how would anyone ever select a team before a match has started for the circumstances that the players will bat in? Think about it. You're smarter than this.
And if SR's and team totals continue to go past 300 with such regularity - its not completely far fetched to think you can ask all batsman to score at 85+ and onto 100+ as you may currently think.
There is an evolution of ODI run scoring occuring at the moment. Whether Glen Maxwell gets given the credit by historians, or Corey Anderson or James Faulkner, or even AB De Villiers (and support acts like Amla and Williamson at the top of an innings averaging high at 85 SR) does not really matter. Morgan has averaged 67 runs per match with no not outs at a SR of 110 this English summer. And he was playing second fiddle to Joe Root for a lot of it.
The name of the game is not to have as many "outs" as possible going into any single match, but to play a styles that will win as many matches as possible over the long term even if there are less "outs" per match. Meaning an increased prepardness to risk being bowled out for 150-180 but to put 300+ on the board (more often than previous eras) than crawl to 200-230 and lose anyway.
ODI cricket is getting efficient. Jedi Brah calls it the Maxwell factor. NZ may call it the McCullum factor. England credit NZ for it and copied it. Personally I wish NZ could find a Faulkner. SA have Miller and Roussow bat ahead of Duminy. Its exciting and logical times for ODI cricket.
But lets face it, all those T20 cricket scores of over 200 was probably the wake up call to limited over batsmen, coaches, analysts and selectors.