With the exception of Moses, whose relationship with God in the form of a cloud or pillar of flame caused him to require a veil due to the light coming from his skin, every other person who needed to hear from God either saw an angel or knew Christ. The point isn't whether or not God could do such a thing, the point is that God wouldn't do such a thing because He told us that we can't look upon Him with dying.
A supreme being can change it's mind, can it not?
Now you are being ridiculous because there is simply no "point" to be made by your arguement (?).
While God could very easily make a decree at some point and change it later all the while knowing He was going to do that what of it?
The fact that He has made a declaration means He knows He will not change it so it will be eternal.
Now we can talk about this forever in circles but I fail to see what you are trying to prove or what you are seeking to establish and why.
Now then I would say it is up to you to explain what you are asking/proposing and why.
If it is to play games then I guess there are better things one can do with time.