Quote from thundersteeleI hope this never happens! This is the biggest killer for any kind of build diversity
In WoW, yes. In D3 perhaps not. Max dps isn't always what's most important... and even if it is, max sustained? max burst? Max single target? Max AoE? If you're talking about a single build that doesn't lose valor stacks you can't be swapping around your abilities too much so whatever you run with has to be able to keep you alive and take on whatever you run in to.
Besides, unlike WoW there isn't a persistent online world in D3. You can always choose to play on your own, and even if you play with others there's no guarantee they'll want you to run a dps meter and post the results to make sure you're "keeping up" (some people will, but then there are always idiots).
In WoW, if you're a dps you need a dps meter because that's all you're responsible for. There are other things to worry about in D3... and unlike WoW's dungeons and raids, it is perfectly viable at times in D3 to run away and wait for your cooldowns to be ready before attacking. *shrug* there are a lot more variables, because you can't have so many people that you can ignore all but one aspect of your character.