Same boat here with ds. He is 2e too. He's been in public/private schools, but we've been un/homeschooling for the last three years now. Nothing 'normal' here.
At least there are some of us here on non-traditional paths.
As for MOOCs, they are still relatively new and untested. They've only really become more and more widespread within the last couple of years. So where that possibly leaves our kids is anyone's guess. It's hard to say. Not all MOOCs are created equal.
Still, the breadth and depth of many MOOCs seems foolish to discount. Then, there's the key factor about them being FREE and the intrinsic motivation factor that's required to complete a MOOC, imo.
