I think that it is, generally, undeniable that ancient Egyptian cosmology was very much operating in a context of a systemic whole, and this is the case on many levels.
First of all, there is the fact that there was no concept of "religion". Those things that modern people think of as religious actions were simply a part of day-to-day living, part of the natural process and flow of things. The seen and unseen worlds were both part of reality; writing a letter to one's spouse is the same act if the person in question is living or dead.
The gods, themselves, were seen as strongly immanent. The concept of sia, divine knowledge, has Them aware of things within Their domains completely and immediately; Their presence flowed seamlessly through reality. Yes, there were particular theophanies, particular expressions, specific instances of more focused divine presence, but there was also the cosmos personified in the form of the body of the creator, the recognition of each netjer in the structure of the world.
Society, too, was a unified whole. Egypt had a sense of nationhood very early, and a mythology of that nationhood, not only in the world of the gods, but in its own sense of its history. That notion was, in the ideal, a seamless whole, incorporating many kinds of people, functioning on many levels, and united by the symbology of the king, the Nisut-Bity. The king as representative of all the people could deal with the gods, and had the ability to delegate priests to do the same; he had the responsibility for the coordination of all things within the nation, up to and including monitoring and ensuring the fertility of the land.
I think, also, that it cannot be said that there is anything like that level of wholeness in modern Kemetic religion; I would say that the followers of Netjer are in a state of diaspora.
There are things we can do: we can recognise the immanence of our gods, we can feel them in the flow of the world around us as the ancients did. We can avoid the fallacies of dividing up our world into the spiritual and the mundane and live as if the gods are in our every act. We can do these things.
We cannot live as one nation.
We are geographically scattered.
We have no system of allegiances in which the political, the social, and the spiritual all flow in the same direction. Our loyalties are networked as much as they are heirarchies, and entirely likely to include people of different faiths, different political leaders, different philosophies, different gods -- if any gods at all.
I think that we have an obligation to tackle the question of what it is to try to work with the principles of the religion of ancient Egypt while in a state of Diaspora. There can be no complete integration as the ancients practiced it, with the meshwork of interactions extending through the entire society; we can only achieve a part of that, and some other part of it will be incomplete. We can choose which parts to address, and we can choose how much of that wholeness is essential to us.
Not only can we, but we must.