Champions Online's various systems, then this new systems dev blog is right up your alley. There's plenty of math happening here, so when you start to feel confused don't worry so much -- you're not alone.
Actually, the basics of what systems designer Brian Urbanek discusses aren't too convoluted. At least, the part where he explains the percentages of what influences a character's power isn't too bad. As it turns out, equipment makes up for 42.5% of your overall power, while talents take up 15%, "base" is 2.5% and super stats fill the rest at 40%. What that essentially means, is that your leveling choices in super stats and talents (which effect stats as well) make up a large part of where your character excels. This is all shortly followed by equipment, but creates a slightly bigger focus on how you design your superhero.
Soon Brian will be discussing combat, which is sure to be a hot topic within the Champions Online community. Until then, we're going to re-read this first entry in the hope that someday we can grok it.