I tried it but I didn't feel comfortable with the rating system. The criteria given are fine for a standard informational hub but on this site you have many hubs which are outside the standard model, for instance fiction, poetry and humor. (Or will these be excluded from the hopper?) Informational hubs may be Hub Pages' bread and butter but setting a specific standard is a bit like contructing a protean bed for hubs. For non Greek myth followers, Proteus was the chap who invited Ulysses' men for the night and gave them excellent beds, but if they were too short for the bed, he stretched them on the rack and if they were too tall, he chopped their legs off.
In general, the guiding criteria are helpful, but as many have said, judgement is subjective. I was not quite sure whether certain things should lead me to give a lower grade, or whether they were not covered by the given criteria. At the end of the day, it used to be enjoyable but now it's more like work and I don't want the onus on me of potentially harming another hubber's results.