Yeah, I think Vempyre has it right. It would be better if this system worked right out of the box with their basic guidelines (and honestly, if you just grab the DCs from the table, without consulting the asterisk, I think it probably does), but ultimately, if the main problem is some ratios of numbers, they are pretty easy to fix. If 2:1 is a bad idea, make it 1:1, if DC 20 is bad, make DC 15 or 17. Not a catastrophic problem, and they already said they are looking into it, so no need to jump on Keith for giving advice about how to use the system as is.