There's
a good post up at Traveling for Miles that looks at the point redemption examples Marriott provided and does some analysis. One of the key points made is that you really can't evaluate the new redemption levels without knowing the mix/timing of peak/standard/off-peak pricing. For those folks that tend to redeem their points at peak times (holidays, summertime, etc.) the point pricing is clearly going to be higher. For those that that have the freedom to travel in off-peak periods it will be lower.
Seems probable that the point pricing will mimic the cash pricing, so in big cities be prepared for peak pricing during most weekdays and off-peak on the weekends. Resort pricing will be peak in peak season and off peak in low season.