As far as I can tell, Ender-IO is a mod that basically consists of various ways to create power, which can then be used to double ingot output from ore. That's very mature.
However I agree that IC2 has somewhat lost it's direction. Rewriting the entire concept is maybe a good thing, however I don't really see the big picture behind this. Either because there is none, or I can't see it, I cannot tell. But if there is one I am not seeing, it would be great if those who see it could explain it to me and the rest of the community.
I personally don't see that there is not enough gain for the materials invested. I actually switched some mod settings recently to cut the ingot production in half (I just hate this double-ingot stuff), because I was swimming in resources so fast after deploying the miner, without anything to use them for.