You are not wrong. But the very reason you are doing this is to create something for said cage. Creating a new system for mechanics isn't bad, but with certain aspects you have to fill the molds they made. The first points I mentioned Role and Limit Breaks are 2 such molds, plus your effects on the Raise abilities as well. There can be a Reraise mechanic, which would be similar to Living Dead, but that's about as close as you might get.
But as you said it's just something for fun, I'm just offering my feedback.
