It would be great if we would have some "gui" with listed available layers/extensions/add-ons that you could just select and tool would download them and install them for you.
but I don't think this is doable before WildFly 9 maybe even 10. unless someone wants to take it sooner :-)
so in short, all this is already doable, but you need some customized script to do it instead some nice gui.