In the systems I’m studying, most people are not yet individuated to their proper level. We are not supposed to give up that individuation at any point. Instead at higher realms we can exist as individuals but still function in collective groups. Clear separation is a feature of the physical world and we aren’t done manifesting it. Trying to merge back into group consciousness is something people will do to try and escape the struggles of individual expression and we shouldn’t tempt them with the idea of skipping that step. Only the individuals who fail to eventually become their perfected individual self will be totally dissolved back into the source and then their individual quality will be lost to the universe.