This begs the question...how will GMs in 4e know what creatures represent an appropriate challenge for their party? We've heard that encounter design is supposed to get easier...but if CR is going away, how will that actually happen? Surely the designers don't think that DMs prefer to guess relative power level based on hit die, or something!?
I know there've been a lot of complaints about the unreliability of CR and EL over the years...but it's one of my favorite parts of D&D. If it's going away, I need to know it's going to be replaced with a similar indicator of power level that will make my DMing life easier.
This is the first 4e tidbit that makes me genuinely displeased.