I don’t think the Force being dynamic doesn’t mean it is sentient. I think the Force awakening or being diminished can be compared to things like climate change. Even gravity or electricity can act differently when massive or conductive objects come into play. The Force changing doesn’t mean it has a will of its own, necessarily, even though the prequel Jedi seem to think so.
I really like the idea mentioned elsewhere that the Force originally behaved more like a fundamental constant of the universe, but when Jedi started to figure out how to retain their sentience after death they began to guide the Force with much more purpose.