There are two major theories about time: A and B theory. A theory relates to endless time (presentism), while B theory relates more to timelessness (eternalism). They are mutually exclusive views with only one being right. I think it is more than theoretical or academic, but has practical implications to God and creation.
Just because God experiences duration rather than simultaneity does not mean He is limited by time like we are. He is not bound by time, but it is an aspect of His personal experience.
I am not sure how to answer your last question.
I most happy to cede that God experiences and interacts with time, but I struggle with the conepts that God is bound within the linear timeframe as we are.
The concept we call Time to me is part of the created universe, and as such God is pre eminent to it in everyway.
I may be misunderstanding you, but the caution I have with the stand you are taking is its tendencey to see time as a law that affects God and something he is subject too.