The XX78 Superslam's still come in about as many sizes as they ever did. The newer types tend to be made in fewer sizes using the spine deflection measurement, like carbon does.
It's not really surprising that Easton is thinning out the variety of sizes. When aluminum was king the choices were almost mind boggling. You could get in the same spine a heavy, medium, light and superlight weight shaft. Choice is great but not when you are the one manufacturing them.
I just bought a couple dozen XX78, 2216's from Cabelas. They still carry them regardless of what the rumors say.