You can't RE any pre 1.2 augments. You can RE the ones learned from schematics, all the 1.2 version schematics will have a "made by" tag like any crafted item. The RE process works like any linear RE for mods or consumables. As far as RE of rakata, cursor over and see if it gives you a percentage chance for a schematic. If not, then you won't learn anything by RE it. I'm pretty sure the new RE schematics come from the new gear introduced in 1.2, from the new Ops. I don't know anything about pvp gear.