Agreed. What the heck is an "eternal now"? If everything is an eternal now then there is no past, or future. there is just now
Some people think that God lives in an ever present state and so He can go back into the past and the future at the same time in the sense that there is no continuum of events with God and therefore makes him in every place in time all at once.
My view is that "now" is the only reality, and that might agree with your view. The past only exists in our memories and what we have recorded on audio or video. We can watch movies made in the 1950s, but we can't go back there and be part of that socieity because it belongs in the past.
We cannot go into the future, because it does not exist yet. It is being created by the decisions we make in the "now". Even when I started typing, that is now in the past, and what I will type will be in a new "now" as I type it. I don't know what I will type in the future, because I haven't decided what to type yet.
I believe that God is the same. He is also in the "now" just like us. The past is the same for Him, except His memory is greater than ours and it won't fade. But His future doesn't exist yet, because it is created by the decisions He makes in response to ours, and how He implements His plans and purposes for us.
What I am saying is that once the past is past, God does not go back in time to change it, because it does not exist any more except in His memory. He works in the "now". He cannot go into the future because it does not exist yet. He can influence the future through how He works out His plans during each new "now" that is travelling along the continuum of events.
There is absolutely no reference in the Bible that God lives in a state where the past, present and future are all one for Him, so that He can go back into the past and go forward into the future. The "now" is exactly the same in Heaven as it is here on earth.
This is the greatness of fellowshiping with God and with Jesus. We can fellowship with Him in the "now" and during each new "now" that develops along the continuum of events.